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 0x00847a3545e05c7e104775dd4663e047a7f1b16966e8d1cfabb705934fd4a1bd. 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/fbd6835d-2df0-4c0e-a03f-017aaac50539.json and https://artists.proofprofile.net/proofs/artist/fbd6835d-2df0-4c0e-a03f-017aaac50539.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 0xad67504b20570b9dfff4805d272a160a0542c9cb96d9947f79d4523d6d35102a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLGL0968123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912125787193ff97d46217cf48a6861329b08c38fb8ccf40f3b565b076b319de. 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/CAA501027401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef73df0a0df6ff86f296a4c817b4a673001b559731a71e88e7309087e8184919. 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/CAA501027403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c77f960a5e3d543f31e1c44c138c22df3c15d09eb99ba46117313a569129c99. 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/CAA501027405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2db4ee4ef03e4840d6bf25cee29730b312640b23bf74c48298c463f77f20fef. 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/CAA501027406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a85f7e20f919bd9026a0e1421f1e575117ca3ba6519eef8ed6c0b86e640440. 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/CAA501027407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83dd554a70bdf8c3b7fc9bd037e128cec3f68a9c2d38c171dbdd801776f3b31. 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/CAA501027408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2715d24b6deb255d0a6c7dc125e1d9ebe14a1a212a58d80540762fd1f45c0d5. 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/CAA501027409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d5b2c6184b1d58d16a52f963dff14cf237bcead1a5091ddd42ff8210fe9ad. 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/CAA501027411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f453fdc30b7a36a512033c78c237f54b5466d10fc639a9dcb5fba08727495e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CAA501027402.
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 0xfdceb16c3e8a5c64a1727364837ed8e324a68091a6b1b2b5cf2a68e2edde7490. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CAA501027404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d8273f85690ef530bd22d7973f24f33e253a6ca35b71a72fd8ddeff53348f6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CAA501027410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e3aebb4026548984d53d527c0fc5b33700244561245b52c6d3b9951805d282. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI491500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef384c9aa8718de7a432474ac462adadd59d28b14d5a5010e811d78cff9f1a72. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKI499403202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a343c4b8c91c023315f61f46c86a1e74a5f12a2805a5e3f9090f74a5c52ec3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HKI491600008.
Les Sept Sauts: Baroque Chamber Music At The Stuttgart Court
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaebc7dc6813d9871ae2e8a159b75865ef25443a57d9cf1c2796d82099a24c19. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/CAJ720434424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2336b32c06b833b6d1446cfa8c6b7a01f98bbcfc23a7d837c888994be38b3600. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/CAJ720434425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa00bcd2e343efd777d2a2d0ff8567e7996ab4aa36160bb28c743cac08505aa5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKI490002506.
Contredanses parisiennes: VII. Greensleeves
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceacb3f40f366f2f184d39a4542052b5247b8cde4224c2a7b56530d56bf5d0a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CAJ720434408.
Nick Wiz Presents: Cellar Sounds, Vol. 4: 1992-1998
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd150161b7153d19b940c3039b0954bd4d7f3789489118783fcc6abfc47a80857. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMBZ91510886.