1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e3fe5091732c0eb23e8991896c030c83253a1bf398cc19c205b08904a1be86. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/738c04d2-0219-4b64-8014-ae32491da6f5.json and https://artists.proofprofile.net/proofs/artist/738c04d2-0219-4b64-8014-ae32491da6f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694bcc4efbda1c4b25338e788e49e7a99b32f53942227e255ee833fbf159bdfb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972461557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6582f1c1c8cbc5f857dc7b655989de7a6c701121303958cd4519bafa2988b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972330842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fafadd69b5cd2cc4b31ea5097297863afac68c6ab07bbac5e5ff6f761bae51. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972461550.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e856f62d9cef119e0f860f8548abd952f6c1c280e19f733eb1808e0d504aa2. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972461558.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc64421ca29b50e657b3aefa2041605b9b1234e59e276a92c83ebfe24073699. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b97a294d70f514503515a9b386b4572133ea0327284bfc9c23239583bf5918. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe828c7aa2a180c36686e7e2ee193eb06b32313fc03c77eee9f01b2f590176c21. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb6c5f2480e08f1b7fe0e708132f30f23dea886623187db981d278962eb6ea. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8c4dd36af1d168ee668d2ed182b261d6cd109b0aaae75f0c91d32c8da540a9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef7de11be20f07c3eadc53eab43347922a244ac3e3024bed96e786ac0c6c544. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa777a4fd7ef9c5e9c73e6fa40d3a8dcdf5a611d8996250c832c84fe68934bc90. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012226444.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e119559a70cee1df85810209d67841d9ee0ba47f3fa2f0487fd37e0557f5ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101880093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568ce0983a095861bbd5318cf7a35aa50ec634a0ea17a82895d51278567f90bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101880095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556010b427c4c877fb9e07d58ed6d721c54a3148047acf633476fef2c3cecb6c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101880096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567f4ac9fa1d5fd37b74427d7251d39cb05372bab5074511c562fa92671c817d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101880094.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b51918be1ca69a5f2f1a6fdd6b836fc25f044047adeed369aeae0400ea47a16. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd903955f5320be2e2d26518d0dcf668342a0b6664f4372b05b8b59d5abc310e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac10841136e921fe90b966e75f9136ff027161add927a1a41c3185aac3d65151. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d3037405b4e648dde426e376f995a90765ad3d5ead1a92527fd354a150899. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd98098d78461d61f298443fc282872b0f62b59bbb697307cf076657c8a183. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff39d2550fd92f504a475abaa9e7f8c9c686b789efca0b67aa00b5295988270. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf417477f60bfadc12b1425b35908efbf936dd085c4f24d719a306db13aaef747. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaff6ea60d0465b6eb0777b3833119d870b90ce6160f854aa9bea5b77113b62. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7189ae4285c26d04482b7e76172e31938f11ca8e0e62e8d49914c98bba5c3d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2046f9feb9fc0adb628e5848c8e954d24983afbed311ae0985d1e097f1c823. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITLU51782967.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c2dd5630292b3215f03edd33ad72c5de56028a2baccede49c179a9f82d2fc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb6802cdcbe404b220f77a020ebd1f67e784c2d52e6ab0d3c58ee4350ec1d0c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b60acb736be86eba602b36d8a38b35f6ee557c0294d51a8ea6b7d1bfbbe0962. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67f9eae27c9a67da474dc79485751d94ba2f871075deeea895f5b6c110c7950. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf402f09a27b63b3adcba5b358c77d63bf5a0777f315e670f6f068bf4d749df6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292cf86194b0d011344c2e947bff38b0c6bb10c49ae6f1a8aa443c8a5b542294. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019c63a9ed4d0e55f013f3554c17154bd9529360be623f9b8bfda3296ce4ef9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f6a362ce33e1a9d32d9f7b873bdbb044df29d76b743cedd394322fb9a5727. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce982e5714d86c72383fc7f6b3ab398187b9a959423e58dfaf9298428b40b14. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f88a0554d29b31dc917c137598f360171ef35bba2464a61080ff28299196424. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90145cb93fcddd4b468f400faa1a8dad732a93c1c41e92a539d32defa1ffc2c1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e8fade119eb3d9a3397f10200cad7dec27df0158a5b3cfb07a8b73f6c26938. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e8b74ec84a58574c037487cbdad3803e2c8f8210e6ee86f71b2a70f4a8385b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb814e2b57c824f77a4b2fb0b65a8d77871af38e87a44255e28c8f166fcd3a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7672e3846a0d1a403ea7c3530a44e52630da706f9d5f6a2294759b9f2075543a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITO101759817.