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 0xb2283b101ac6ea9065eb3ccc065c6dc31dcb03ba88b79c67d8bcedbac75630f2. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eed693bb-484e-411c-94ba-0f8addbab7f2.json and https://artists.proofprofile.net/proofs/artist/eed693bb-484e-411c-94ba-0f8addbab7f2.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 0x200d6b9313000a82b13b98bf406553666fe6641d1f4a19c5a97ba856ae57e0a7. 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/BRPYR2200372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac3663186c0f1ba0867fb26a28fddf5153d840812140d46761f28536842ff44. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BKJBL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b3538bfd906b98432eaa2666440dc4836a542db1e3dff7e0550e316819f51. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BKJBL2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb019b257ccab47ab4e6ec60d7b0e8857ccdc93e507837487700c2d332d94e10. 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/BKJBL2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2646a961f24a77e7e1e9de525c1be2541efffcfb4fb6cee9b5e8ba46901df2c3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/BKJBL2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4561cc8efc68ca28109e6f67fd9d6c22671c6ae04f8387c0c3dfe42e98e73e23. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BKJBL2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621d4ce33f54e5b9fec18a7dc8ff9e85c6cd91c78c4201f8f8194fbe792c638. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/BKJBL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbc6443f42a64ee87fc63759996c62af67117514c8f22ad46144ce3b904e7c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/BKJBL2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9d90144cc78d2219ede2a0e27a9b313273e3e6ced145c2f7d83375d3ba0788. 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/BRPYR2200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c7c704ccb1e85a9a8a40a9438fd8ce79c49b7d7c092108d40a47dd98930ad8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/BRPYR2200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f8cc0fe6feacb17df8c756644f21fd00c91ac6ea028b417d96f3791dc1ebba. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRPYR2200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5268e7c848d048556984ab6fc6a050876bd12a38a0bc4587bdfa07f9dd7e0dd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BKJBL2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd225e35667b9c8bd13f23eda99d807697e8bd14ad9c4bba336dd67213a6f69. 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/BKJBL2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c9b6f3ab240e04c1e02985401856941be3b3700d3dac8d9b110a6a6d28a3ec. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BKJBL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc6bd13da57baa70d293d19a19ef595556af628922c0182aded71cc44406dc0. 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/BKJBL2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cea5835098d055eafda8800cc39c66b8d950e81734df75eb59190c3b2e0bc86. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BKJBL2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55eeb075c4fbb37dde9f39c765b6ecd75f32dfcd636cfafcf8b5952c390792. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BKJBL2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6627b1a762cdd3157e22f203ff90ffa63c1482b20dc5a74206745bcdc7926. 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/BKJBL2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc033d2f0ede9d4077b3625884d307034e4a0532738ff46748e4679e558da3663. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/BKJBL2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9b1afbdd3daa337fd6825a37f4af33cabe1c43154cc27b17cfc637a1aad61b. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BKJBL2500004.