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 0x812e54e94a0b8eab507382c8731683b2cdb20a8924d7df2496d951dffdc8e07a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3a62f46-bcfa-4b15-b166-66f15bc3aa46.json and https://artists.proofprofile.net/proofs/artist/f3a62f46-bcfa-4b15-b166-66f15bc3aa46.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 0x8d04bf166e22ec5aa9caf0e6e130160de5b1ae8a3db2db6e32349b5399d5b170. 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/BXDIC1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327dd9953d322a72fa5bd4f0cfcb0ce1ca05c3d4672c9bdf901f805feae68d44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXDIC1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89ff6ef43e5dee86af8312d7c45f9a186353744db68a039eb55ededf7b92cf3. 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/BXDIC1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585672c2a708cc5a48beb633f646641dca5f25c400e68c36c082126f5c136235. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXDIC1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac5b7fb8e5f022ab65e74c9061996e4ffb795b6817a79e421b4550ca8f60b9b. 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/BXDIC1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f9e524d41fde7fc19c4e56babf7c8b06f27601a597da14bcdad3d856dcb6c5. 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/BXDIC1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7254ea044e76a079a42df5527f3b3f2cd3e6996402e5286a8ace60a74d6095. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BXDIC1400001.
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 0xe63ce5c09f9d2ad894b874dc3a43821939faab56b9985816033d64621880c720. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BXDIC1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f43af96a7f21a50827a1e7aa3bc9d23b4f7d8e2d2e5b6e31deb9d563f7b8617. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXDIC1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9023f46cca2572df8f4fb71a4c57792ff1528081f759f11c9a020532561c6b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXDIC1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114074d59cda2d3994dfd41f0c7399492b178bdf50fcbb7cacc48e165754d44b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BXDIC1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8182fef2c12cc1dcd87af76e8cc3cbd69f06ed6f1e97f0c2778b536a23d5cc9. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BXDIC1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ff4d5045bd34ecd71f18390020c07835c80f754de1cad562c516333758b863. 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/BXDIC1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f76fac49ea6cb0e6d23aa55464ac6789f8dbc9910f5ccb94546089b19a0d28. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:33:50Z), 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/BXDIC1900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8244c9b8707ea3a006f4fe5b50d0ab2de58b6ad3ea6c5f91bc928d6d5eae8bfc. 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/BXDIC2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426589538b4b6f2e6098f41f1aef0124884c430afb1bfd9d8cdda9cc1a84a2c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJY2556288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60613d7ce65a3b1e636240ac72aa8e895d54de4f8038c6928cd19779019d30c4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG2415469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd895192e78de0683e7a4012edb52544bd9d539b9fa430033218c0a24bb3257c3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRV551800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad5922add9d966588872be11a32feba1cfca8182f2b5548c1f65b283f7aacbb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US7VG2415474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4869886d7fb045479a559a45537136c1d6b5a901b8c0854219c5fe14171d19c6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US7VG2415477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cabc1425c2e8d727e8ec5416497d503a8643e8771d69e5d1f549a4b727a56a. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/US7VG2415479.