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 0x92afe26c98a8f24f93ad121bee1cb183973777269f71c48d87983f588b1c4ae9. 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/15a55067-0ee9-4956-ae34-e5a783d6f2f8.json and https://artists.proofprofile.net/proofs/artist/15a55067-0ee9-4956-ae34-e5a783d6f2f8.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 0xbb7d81bc97e66e10b062e6e5dbb5a0fe7b3b92bce5afcb2097f5f4fb820a9625. 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/QZTB32291869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11684c25aa1442eeef2d911c1a79b389b137bc9eb18676877a71a5a5e6a3e2ff. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:05Z), 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/QZNWV2393282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29e1c2891d2d051e4625a6a1ee769922b78eacd0903a81fb0dad9c7780f6993. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWV2393283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aaa2c7bc9235352ef84e795e834f7949e135d6b00337d1bbef28222a0328d1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNWV2393284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8df7ed22484980b0ef9a9e6599fa8974ce6fd99d71b580c25cd50b497212d4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWV2393286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a908f086dcb2e6cbb4604d89112341e409cff2b862ed0183e77bd63333b493f. 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/QZNWV2393288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882719ebfadbeb295eb93d76756e76fab81b39f33dd10d1bb44fb2bf3b053c7c. 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/QZHN82435996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f6c5d71ff7dcd93bb9b3da0ad08e02e188942ff38591196a7e79b00c510b4c. 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/QZHN82435997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c6dfaf415732a8270b16d0b1e194db7358807441817e38a83fa0c3f4ef47b1. 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/QZHN82435998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76dcd307b91ff819a2731c3c8edfae2fb214929fd65584feaba3b2c90f87648. 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/QZHN82435999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c91d298160711b477ead24c3410497b49496696a952a6f0385687712939bcba. 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/QZHN82436000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891007ea09ea82a3b850163b743b3b478bc89e61cfd27b4909fce484d623f2d0. 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/QZHN82436001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817a7ddd015dc27380b671298fa593b85d0419d92990aeae6bc03ac1f010fc9. 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/QZHN82436002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5279b9e139fdadac1be62db89c5ece7001c8e11dba5da656b7afca6e43a197. 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/QZHN82436003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091feb10ad220a8c9859acc6afa59411fb0a540ea6f990ac5921bd5524524544. 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/QZHN82436004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27725d3f892668a45c052d20dd47828d6f2d334035cc2f8fd4f924e982825f0. 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/QZHN82436005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4071ec07cf535c5f4455ef0361694e152c0d1e6db8788f236e3f1fd5fb480dde. 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/QZHN82436006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c6161a9063d09007862916c84adceaaaac7302341fd96b3470dab987de7400. 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/QZHN82436007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9aebf18e1be214f9c6e5c1f40843b62d13afb9bf043510c3d00d9c9666bc0e. 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/QZHN82436008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40027c18f0834d6be763500079f72a2c1db5912920aeedda4c00b4ead5c9bbdf. 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/QZHN82436009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3cabf0730e276f36145cb01c286ea4f2a77e99e44fea79f83c5ebeff43aaa6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZTBF2494256.
La Cassette Vol. 2 : BIENVENUE DANS LE TRAIN FANTÔME
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaa47bc0df8cdcfd519d30f0a199e60f7d329a85dc22db6692551722d3d99f6. 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/QT3F22499491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15fe23af31f24b315404fe05b3cd3a1aa617f341387e68c34da1f0cd7aad4ef. 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/QZZ7Q2407657.