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 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 0x732638bd643265bc581b036e5ea530c08d1e71c731636781aa5265f8a25d03aa. 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/9e59c3f3-26e4-4802-916a-a94529331e5e.json and https://artists.proofprofile.net/proofs/artist/9e59c3f3-26e4-4802-916a-a94529331e5e.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 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 0x5ec22ab2f3bc68eb7cc25030236f830b1d36b1c340f2ccd59a3b010d6d53fb04. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:03Z), 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/ES5080700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b78e5cc2b3aeb8f8b7bd6c271419263812aab9476b4c76e8fd88b485d52c6. 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/ES5080700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615cd26b551f56c2292e1225b044d6750bce5f6b33e9152e053f958c5f1bfeb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5080700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3279eaef19dacc7d2d339c89293994d4aa51c5053db5f17cab49c96613a6e2. 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/ES5080700220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9087c4874abc6842a111cef61d37007022845e8baa204b0208738aab8abd77. 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/ES6060988201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc381575bc36a82c82254745505e454f41f765dd1d8fc545c5c27675490894d82. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES6060970102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf020b8427138cec26db00ecf597529c8c7033ac01b2b6dbc9cd62eb51c0aa. 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/ES09S1400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaddf16eb45eeae7d21390d9b1eb8784e36d9e5bb028982e6df08a796fa2afaa. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/ES09S1400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202534394240bc97a127925a86d3966096b3d1010e9eda10b0bc616260e57fed. 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/ES09S1400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e7371dcc877cc7b4424596beb271421bcd8471155bc713e5335d6f6d6b5c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G1742603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934fca24136edb52b3661f00b6ba534cb25a876fbd6c88e295a978fc9d003626. 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/ES71G1742604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8b788fc6deb8c4abb6e468bb76e5c3dda22539459345c816e76dcefb3a9989. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/ES71G1737460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9d63ced2ca3a084d1813a2df962a2e38338b3bf0c8ff6ee7b2269fcc4a09a. 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/ES71G1742607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf0d2e174fa9bd7ccd9cfb25ac36aa63a7927201abadf788f64215e1412311b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G1742610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2623e1630f2f3761b554956e035c33bbb8dfc4a38b2a9cf8a955b5b68df9bce. 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/ES71G1742612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdf37e2bd504b9fda18b23b8f6d559aa807341c96bf91307445a097518ee39. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ES71G2021815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a8f6e13ef5975ad1e53999b23d778fd06a25cd7b0950be46a1e0b0fd9ec74c. 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/ES09S2000396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4611a48e834c8bc0f75e639749428d571ccffa81e2d29e2dbfb4e2d3ed86e08b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES09S2000398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667638071b71d4549238fb546848f3b7963416727b51a08b9734ea34dbbfa644. 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/ES71G1931607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6c7019e77ec8909504f140c224ea80e5b6ad6b1a9131b1be91792e2e7bdc03. 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/ES09S2000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0633dcae6d462eae496ed55b77db43af4a96ae9ef158cc6b88a2cc882e693f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAGW2331863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c4b1e288a646d4f308c630dce8468f07acde94573fa013e1a0557a5caaff43. 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/QMFME2391734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1be402e4cef5d711c43c3d03a754214fc0b75952d13386325a689b88380e7. 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/QMFME2391732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0398aa7a1ecebffa37f77cb35fcfc9a7243d33a018b31c7f6a3233ff24971e8. 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/QMFME2391735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19351e0e116cfec8ab7c21584936927693c7f4185d13bbfe2eee5fa6ec02787. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMFME2391733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d68cb7d5ce159d313ad2aab558fc18b5917225494d0bc60bea3e63facd51006. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:49:35Z), 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/QMFME2391730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec6647ecf2589e96cfcc7739507ccb1400b24f55983a357edbf0af45a561312. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:26:27Z), 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/QMFME2391729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697162fbd90ad8d1d5bade1290961331d70dbcdab409e1ccdf065e816aea4bcc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QMFME2328623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e7dddd065c27e16522af4d4c39d89839beeb2ba97097ac125521cb5128f71. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMBZ92344083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc411083925303dd1e871dbd8c545729d9204cefbe665f34614eda89ca80bedf. 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/QM6P42343502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be5d1ffaa575d201ee3b6c02c5a6fb34de31dfc1f8039c0d0394e2540619221. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:51Z), 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/QMFME2391731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd751a8529cabafe45764fe39949d11edd4e048fcb29023d753c8e5d0639c00. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5022000859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ee74c985160906e0ffd3dcd8ccd32867b2ef7dd65865c6f5537623ebcaf960. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6061510309.