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 0x89f2dd17989cdf7ae6defe3ad7f587dd2674390c16890b6336b5708997dfaf96. 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/34e20469-d010-40b3-b990-b22e615db5e7.json and https://artists.proofprofile.net/proofs/artist/34e20469-d010-40b3-b990-b22e615db5e7.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 0x7cb2a4656c8a9522e5c79de014762f86c3e4270053e4f0f2000d27d4881667d7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBX721900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ac3ea8a5f97dc08c04799a9cd2b32944673b54e39d1cc03a575bba5daf9411. 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/IETNW2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ecbd30e5ac029e6f905d84c03a32eb00abd6176e4ae54f42c50374f70936e3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/IETNW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db5489a76f7819c0524e60a1a6b562d40f719a74371828a84823b18ad1119f. 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/IETNW2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcbb79ab20840799e0eac5100ae96528df7a692b111047a0a255b4bda237cfa. 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/IETNW2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b92ae3837dd1d6cbbfc6ce3a5da3e44eaef6a28103f025293b4ff232e3fe2. 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/IETNW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b32ebc8b857e3c4f479d24ab6997a1f8b362932c5cf6147196deca9f2bb5403. 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/IETNW2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c622589df758e533f0141100847202b9451a9e361fd0563599f8c405ceae0c. 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/IETNW2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ec809e60c7621d12c6e1be00a9a32989d211b1f518f3cd74d9508001358ce. 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/IETNW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8bd0d894bee9e17ea1e582fcb06caa25d34c8b6778d95c8277cc34713c62b9. 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/IETNW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43229f16bc983692c8fdc3d104508d8533e1276788311d3df7ca077977e4e362. 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/IETNW2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ee8de405e577e425e0d75c4006202b8878259bdcaf9f40bb1eb4be3fac75d7. 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/IETNW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48333051f4f8ceca75ffe9ca02d772e4d064207f417cbb52e1653d87663caa4. 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/IETNW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813cbb3849eca8d480f4d25bb0c548d6ed67b9018de2b9c3a00b86dbee048020. 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/IETNW2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8bd0d894bee9e17ea1e582fcb06caa25d34c8b6778d95c8277cc34713c62b9. 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/IETNW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ec809e60c7621d12c6e1be00a9a32989d211b1f518f3cd74d9508001358ce. 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/IETNW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ecbd30e5ac029e6f905d84c03a32eb00abd6176e4ae54f42c50374f70936e3. 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/IETNW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db5489a76f7819c0524e60a1a6b562d40f719a74371828a84823b18ad1119f. 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/IETNW2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b32ebc8b857e3c4f479d24ab6997a1f8b362932c5cf6147196deca9f2bb5403. 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/IETNW2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7bf1fd123dfacb406554aa3f3db4b5d76dd2bd081ba325fc301d1046b8cbf. 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/IETNW2200017.