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 0x4ea01e583358ba61f22d8273890d06946ba3231e04a0ddc39eb8d81a58553e14. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a26ce8f-29c1-4239-bd72-cf4d74baf953.json and https://artists.proofprofile.net/proofs/artist/2a26ce8f-29c1-4239-bd72-cf4d74baf953.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 0x7466ade0b7297a654d84d5fb5e44d7dedf6aba1ef6e30cf89b02d6b5eb3d4520. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:09Z), 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/NLUF92000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1578e3859025673a0b70b241402be68ea7f609d9777d7869ad564b35a07414. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:34Z), 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/NLUF92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0cb29ccad2b877a10a9b8889ff34617e4ddaf38fc8ba4f639c064424e41c5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:30Z), 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/NLUF91900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b6f0829409324306ec99bb8394412cece7cb4347789189b3d21b6226f2f283. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLUF92000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223fd501764f5f50d8568a616a075d8ebe3082968019c148e819a81e8a007ce7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLUF92000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e7603108e693b9d984430d39b21caa1b3e1baddf727a861ddd8e13864e519b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/NLUF92000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67940b96c523f444dbb8eb71395ca251cfcc6c8a3b4987dbe47c14f8668819cf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLUF92000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a873753f8ce26d501ee48f3b90e21d00f5145c5fdd9deea2b717444ffe5acdc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:13:22Z), 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/NLUF92100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1a3a93a73998f8d02f46ff3613bc015590b92c8b6aac2c597387fdce98aa1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:16Z), 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/NLUF92100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a3d89fcde31a7b2496324f55a1dd3d79fd9afc3d045ca1375e09a0f0c2e8e4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NLUF92100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40a996d52c5ed6c1772f932b28ccb14237b60d15d380de5186f6ff7a11ba187. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NLUF92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a873753f8ce26d501ee48f3b90e21d00f5145c5fdd9deea2b717444ffe5acdc. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLUF92100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c8466697f8c42256dfcaad3cd7e2677f2af88fa91517755d180aaddd9563d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/NLUF92200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a713cd4281b2230644127388394d8aa4f71e78fc76068c2c56e2c9cc27ab9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLUF92200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3699dc7f002b61f33cf88a7a43144b9fafa582460579608363eef19aa768e3ff. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLUF92200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27ee9dead11e82f69f4310db7484f4cef7c30267ea64dc0e73cd476976f96c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:03:27Z), 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/NLUF92200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d6c2f6e583df5265f38053ac4e18466896b43e9ccefc2da01a6a4e211a1667. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:09:57Z), 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/NLUF92200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c9b00df9d15f4d572f4210b09585fc4943246cd1faf3e550e34374eb3d9efd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLUF92200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e3655cde9252f1cc2c186d80768b8f0c30ac8250cf65b0e46fd4734b2f4e98. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NLUF92200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba7387c090eb748ac68994513de86e2ef88bfcd0519fcbf6192251cd78f696. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/NLUF92200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9789a9f4c543a37dcba1bf5f36bbf2d115c398805443a61ac92cd27d8c326ac6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLUF92300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607aa8b6e84a022642ed066a24ae10a13b888a9f58b3257f44d4fd015c5f2da4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLUF92300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae8f5a0d707da99c95af6a1c1b90e67708a60f6f91d2c6586abc2eceb29acac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLUF92300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5e80a6b779531109ebcac50e8143c573afeb0f4484efa0dd91d6c107cdd55e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:19:01Z), 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/NLUF92400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefbddee041491aff77b21160f66809e857df198df3ac5f018aa27a721b7f210. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae8f5a0d707da99c95af6a1c1b90e67708a60f6f91d2c6586abc2eceb29acac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLUF92300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefbddee041491aff77b21160f66809e857df198df3ac5f018aa27a721b7f210. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLUF92400064.