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 0xf1b68b4596ca634b07d64af91e31c4e7597763a42bedeb80952a8d699761d038. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62a1fce7-9dae-4008-ae2d-a6d3155599b3.json and https://artists.proofprofile.net/proofs/artist/62a1fce7-9dae-4008-ae2d-a6d3155599b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x76d59bdee713429f1ac635bce75fd36ad60e7b443c0b4584b09dc8077b340176. 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/USHM92179189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728a92bac09a763a052520891c8fea3c2c94dbd14627bcf13dbf598367714f9d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM92179190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051437dea2c9175be6c4a8e01af79eef036246198e8cb4e2cec55a3300a86ea. 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/USHM92179194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e04c6cc0d4d560c566d11864e5a87d1f1483dd3a7ab49c34469a12effc9521a. 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/USHM92179196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaa5cadd760d004811ea08d80c0f26d7df8586a374bfd94b54d5f08f191aea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARQMX1600432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92884e9c1abba888d53a78c0cf3fb26a4c96093729c98644071b4c5a273268. 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/ARQMX1600433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5840daf003ac7fb34a65cca9edb4a4049a1a78ac9fd8d4a2753f3e7033dd3da7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ARQMX1600426.
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 0x54f2ed8cdb9b89a753301c2830f37b9c77f9047b19c78728820bd0c6d4b431fe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ARQMX1600431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f1df94af4150c433ff7d8bc20c80550db3c2f7d0ca0ccf5dafb42f40d474cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARQMX1600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82079c7b0f4f0be2393c3b3a47e6b5c26d2a39f569810bc0065d21dd542dd52c. 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/ARQMZ1600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9372f8d8aa64c43812d5bb3bbd8597c4856cdfb58fa1e71b12b559df756c87. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ARQMZ1600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0799e8f470a565a77fcd63d5b909c6c8430e33196d2dbb124cbc137ce9d349a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARL371200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e19fb7d021cad596b1e50e9ac2f6d5eadb367d5d4f7e89f9b170edf38999341. 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/ARL371200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3c8c6f4970c990a379f7147708cf58e8598a771dbc12afee6d72efcacf53fa. 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/ARL371200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd2e5307b5b502f34652aaa51e21a43eb641d5f5e20aad607e9d9ea282ff79. 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/ARL371200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e9474956676c35cebb8d9831070a77f3dfc82bd806045da9e3433a2772f33. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/ARL371200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be959e7ebce5288d12587aaed561de15bedfeb37ae424f4571ca1244a0ab608. 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/ARL371200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19af1d15967fc011991a6642567c8254ca2c915036c93dacb2ceaf71d9a981. 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/ARL371200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73208d3a1d43cb21c2711dde9e0298dba296b8d82e244680335af807625bd66f. 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/ARL371200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f11837c423063351966723471eb1880d413a3fa1c65aa12e48ac0a352fafc71. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARL371700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e519d97391883a48ddb6e6ee7d6b26997465a9ba9e2138cdcad592688d07e01. 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/ARL371700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083684327bdfc33e321b3d9059cc495db2cb8b7cc2e266b5e6fd9e484e7262d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARL371700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7c9aa3d6642916ee82a5541ca4ffbd6ada7ee91983bdee48d4e48bba2cc7d3. 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/ARL371700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ec41b1b76eddb66184123debdd553551838935cba39c59b35e53cfeeab8dc5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARL371700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a7da549e9ec036a530d75cb99bc770c154cc12e9099b4ba71d96c20c27f759. 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/ARL371700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7be442f5b6b325369a91dc8a602d5b2c4bc1495520817d8680e6187abc49b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARL371700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ed3ed0f7019463d4fe96b3623a880940afc4dc90efc9c5b7b23cc65ffdde7c. 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/ARL371700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3a1c5ad1fe6c6ef90cf97d7b76fd5bbe43ae9b4fd5b3dbcf7f6a0c2db2dd01. 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/ARA490800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bf39789c74e16a9924d7499b81f49e02c10c3adb199e8f11e95a3147efc4e1. 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/ARA490800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9341436156615ec5097902500c031314d99ee6736b32854eed9d9dee78bcd26. 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/ARA490800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f12abcad40b5b992933c14cffe202cf081d0fac320bced6fc5817a750ce678. 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/ARA490800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb89e02290a0be7a63e0d726a355a6e7fd9f3cf2960f11fa2c473ce712386201. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARA490800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf81696bad8482b514f4a2856405ef4d8390a9df899bbbbec80c38678fb717e. 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/ARL372000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17edea9f71309d29f0d3df950d035b1326d1dbc09582ebbbf6e4cb869fa96c83. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARL372000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982bc6471e9c04e512d9de898a26b9a450edade6e5bed11fffa7f77571d1e8b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARL372000009.