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 0x6309dcd37f879831c969183073fd9555bf5bf5f46918a4bbfad14c9b4580abb6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2720a9d8-1065-40af-b50c-cc099c2b5379.json and https://artists.proofprofile.net/proofs/artist/2720a9d8-1065-40af-b50c-cc099c2b5379.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 0xceabdc2a8b34617baf8edb9c4f6d3c82378c4c6acce1971f0dad0d8711739fcc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL6759900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d71c388d8ceea31f10b4f9d0c13801d94b068f55bbe29b57a3f27d3d30a4350. 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/NLEQ50800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae38881292104d4b0563ac562a53568f96c367f3c725f08e0bd653ba66f36661. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:18Z), 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/NLEQ50800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37909434d75bc7099cae8d878b25f902ae80a7c49e13481c2801724ae5d329a0. 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/NLEQ50800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ee94022e4b48804d1ffa7b3dd7caaa8a02b31e92f22d3ac9a29444ae0fa743. 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/NL6759900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3c64ae5529eff20661fe1fbe1687874607ba961382c74c27f9501b6806a9d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLEQ50800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55b3c81ac027816b83f8934e2ca6d3bfae97d7f00f236bbf8ffc47b091d42a8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLEQ50800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b0db4419df1622425d3b8656f7ebbdf9eb605713bac1eaa2d9f83c279664de. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLEQ50800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129b5b061067063f7164a598b687556af1cef7e2fe01534a28c88e2d6e96c14. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLEQ50800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1648cca9a7bd73a37f49aaaef5bf08416000895d1135715907da4f0d9cb1b5f9. 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/NLEQ50800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd273452c03c8904feb063086d1efb5d4614795742d1c099a58e44df26e9813dd. 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/NLEQ50800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfcb2ba66df36ac4988c7bb6c3d3d27983abe60d169c06e1f0cf6784563b0be. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:34Z), 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/NLEQ50800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199c0a4adee701470c66bef6c76c0ffffc8e0c38c7cbb3495efdf03cd592222a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLEQ50800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30efd5776d5f459c79fe1f3194d46d0aacb8dff5272b9d5361292b640cf0d7e0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLEQ50800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4556287e37b2a60707f1b31ec72935b5f53813e5e19b0917912b692f2a6ebdfa. 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/NLEQ50200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204a5958f304b0845f86287bcbd159638fd4032725c56f6949b07eb01495da2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL6750400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45a8bfd954a19d5b48f93ed14449bf5bda064d624b3bb22e98969f1ea0e190a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL6750500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d17aba396a855ad244db925bbc86d55552a258703a65f84363e946a1a66362. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL6750500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25664de9cb46c73ceeaf2add1fd224da86da2a70f388d62956599be4b804697. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NLEQ50900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79970b736d0e6eea74a9162f7f064130883b27ed5e10beb0fef312550f668570. 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/NLEQ50900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79970b736d0e6eea74a9162f7f064130883b27ed5e10beb0fef312550f668570. 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/NLEQ50900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f22ebaaded0ad273b0e28415056add055dc911458c50c18cd651eb6b6b4b0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBKPL1415903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab785bc3e382ec371e01c37f4af56fcc88a264a37edfa94ab00275a990af38. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:21Z), 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/GBKPL1415904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368b489cb92a671461a5af37d4b5c0936214fc4c0feb4d7004918d20572a8ee9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBKPL1415905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d78ba5bea111eca38a2b92664bdb45296889082ba312b5de4538fad3763b3d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL1415906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e50e79259256836f56e3e3093f66e0c6d3e9d4e18ea45e58da7312e46c13e6c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:32:58Z), 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/GBKPL1415908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7f093a8523d0d7a164ab33d42b59e79e5a3fb17286fc5cf153bb3efbd84f54. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBKPL1415909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98695c71f892b991bc0a72651c0f41e2fdb1b376db6a0b0b06ec50b68fec6f02. 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/GBKPL1415910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957174ca86680cbd0268534f82ab7ae9a8c62d2d21499624a4e4f9306db379f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBKPL1415914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ea0ac0fc5a310d4e4cf1639928caadacd99d727102343a9a19c09b250abc3d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLEQ51600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5007883f86e84eb009820768c36bc8a58775ccd1eb24fdc114d73a7ce9d38c. 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/NLEQ51800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d36a264258ab0f193f8faf16d5152d8965b16fd9a58e415d2832e8b3a57907. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLEQ51900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2b0b1bf8b54409b4870b021b8fb664587ac37e9b87870c685248889c6eba0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLEQ52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d4a544227080cd638815a0116b30585131b9d13f0af35c48b58a50db617633. 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/NLEQ52200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ca23418f3c424d4016e38528d9b5fe65f62bb29739391f812e135132c5724. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA62445801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6234472c99737996243b103f5a3054b14957161a2e40f9f84b22cf625f78b48d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMDA62445802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e61de7ada7ad855b23751a0b59c05e421d62e8f20f9f0c0a2e5c7448f6831. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMDA62445803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c823815834159fc0586fa7bb017d4402ebdc51ef14950ec56cf6f308e72a1d. 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/GBKPL0924802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3347c853274c60e4c1d186858b8b34cf5be69902cfedf2c6cfa48cfaef0dd5. 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/GBKPL0924796.
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 0x280cc50833b1ba9f7d93c55d64ab03f5c99ff218143e6679e8a6c6b38c5483f7. 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/GBKPL0924742.