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 0x1f9e1e819eb793fa9cd0e9f29dc95bbe6b59c48c260215761a647895e1d428f6. 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/56eed93a-d3c5-48ce-9bfc-dbe6edd9f1b7.json and https://artists.proofprofile.net/proofs/artist/56eed93a-d3c5-48ce-9bfc-dbe6edd9f1b7.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 0x6a1f1db5f72ee91dc6d9218716b7622921f49541a410caffe383f9ee27aebba2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:39Z), 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/QMDA72229708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1c0afd7bb26ad5f52d2701077e450edd85c2f94c28eb9fb7fff7f31f175aeb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA72229709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75da3a7fd36b90ab0487d8a5bbec0266a6cfded76fb1ace6c28a4db51ab75ae7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA72229711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c93b39a546a4a7df4f1239af54ff7c10a93749331cecedc071b3dee9f8f51. 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/QMDA72229712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb106b494f521632454800af1b475a0f3492dc83cd6b3f92e6b880e7399d2802b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMDA72263535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385e58597ffc6a5bdef96050d9b6a8909e677e883fff5144e41fe7a288f076f1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:09Z), 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/QMDA72263537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec06bebb3fb29dad0e9d67aee1d1d417a201b37ec854736e30368d123962d9. 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/QMDA72263538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038082351340530123d3b51bfafc007f6fd418d02ff70c679cdea6996c9dd32a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMDA72263541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5164756dd72ca8805b658b5b4c69fb8a0527aa4fb9d6cf2dc3df45aca24472b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:43Z), 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/QMDA72263542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c54885cdae08376cbde3accdea7c878ba75553ec604a60a85eea590a78b594. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/CBA9E2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd45df5f999ce50eb4c72d5c804422a9ce7b7355958221fbe97b3966d43c62d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CBA9E2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dc81f7bdab999b7f1f8294879e8ec706b7232608fb81541ad68795da996bba. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:52:55Z), 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/CBA9E2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ad55b0ce1fea266fcc82791cac52adcd60e7824f5972abbb766e48fa69e3cc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CBA9E2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da42292b9ef4eba4cf1a1eb8c6bfa3b7a7e6ce976b04081f16f2597de5f4d6. 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/CBA9E2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d20a5beb13ee22043c1df5683249cd8b47764fdababf1805781b3df3a00a73. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CBA9E2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022d3424227eee23d6e18bf1f42d477b711e7563d4656c0d3a3e73e92557610d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:21:32Z), 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/CBA9E2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9e7d5dca34769be83414386de9bf6cee1a10b394db3afc473fd1e06d65241. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:41:15Z), 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/CBA9E2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ed76f9196900a165702a5ae8a80dbebd46f0e6ec68cfc6e350374308c7ff6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CBA9E2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ba53533ff55ce26952344a04d1feb4bf22962febad5760f55d6048471b1cbf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CBA9E2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7671d034acadce8a4fb3b11d7a1bc94ef68e01cdf8f4bb53b9ef53fcab24158. 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/QMDA72263565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704ce643bfad952457fcd232ceb11f582bb145f30e08b462493fece72962d955. 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/CAD940981804.
À qui le p'tit coeur après neuf-heures ?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814a3ec997a5be3f315012e5b2b7b9e76627c4e055c4e1a405e9493d65a749b4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CAI600700024.
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