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 0xa0039c37768ddf06fe7f85cc81f829fac0041f4c0325c9fa42f01dc37a1b1729. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ed510a1-bfbe-4142-a8dd-e5e106b37535.json and https://artists.proofprofile.net/proofs/artist/6ed510a1-bfbe-4142-a8dd-e5e106b37535.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 0x642147bb982d004619cc99bfafb92edc45b00cc3e4f092c43322f78c90ab9b9f. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/USANG2446405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665073894528fd418b6570a30433e6361a0528b174052ecbc7057377068c3c4d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:56:09Z), 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/USANG2446408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff24ca809a8d6e8af4f6d116e2e9b360721172e372eab894e9a598f8e79d64b4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES47F2501768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b86efe4e0a87ad70929b87b518dc23d472374fc8b383a3ae28acd480faa06a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES47F2501771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495a613263b1ee08532d6ddc7631b0573940355206cb6c2ab9311b1f56c45f0d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES47F2501773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6b1d0ddd60f251f388eb35134692333fb4d249c3786022b3e0a082e503404. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES47F2501774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7a9401badc28fff232d82970fff40e4134deb9eba53373f4fe0b282912bc22. 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/ES47F2501775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9672bdef26724d476d75054a5ce34e8d9ac3653c703421198cb33614e70eaa. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US3DF2569890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79f9f78fd01626cedc7d2bde927555cc313fc575324a2152bb7f3ba2e7a7509. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USANG2509178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fae373dc1b37114d671918dce515e412ae092c5a0c2d157215f2191a49013b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USANG2519733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b21f100d8fcca71ee900fd66771492c87a64442cedb78111c6a19fd832f056c. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/USANG2519734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8674ac4f1d73a2186f0487fac79fb6cc8c11f95d61fa9eab81e8baae0faa7b0. 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/BX4IU2510559.