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 0x38886da8522e223c9cb7caa276f57ed3198b5d843d800e124f3292f91b492cef. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c530d267-f33a-4127-accc-fc58102896f4.json and https://artists.proofprofile.net/proofs/artist/c530d267-f33a-4127-accc-fc58102896f4.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 0x08e60f77fdf01c29bfe3bcb9ca0f518a3a3842f98b4feaef66dcc86d4a80a679. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:04Z), 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/PLC062365592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ef7f918d3fce63cc72174c960325699958ad6fa39ed496b8ee2232ad8431ca. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLC062442308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a9cff17c2f4c943ead2428ee05e5b3b70e71fb9079ee756ae4f0237c6d396. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLC062509140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf6a418ad2375196afa00b6beb1f6f77cf91722529eabddef25cf8ae58e183d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PLC062525735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f767ef5a531da2adda0152468fc0a1b4b30000d7101ed3533d946029503c34b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/PLC062519284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70981513fcea88356fc6b80af002acbe7d76b65958eab24e2b2533794feb3b8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLC062519285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798480000c9a1d235b49dd2f3b948d506530835f4f889abc9f50c461c4fc68e5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PLC062519283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf6a418ad2375196afa00b6beb1f6f77cf91722529eabddef25cf8ae58e183d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLC062525735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3be4b3057946e41cf7f71cd5ab489eb0b7d95305520ec23e0ddd5a2d33e38. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLC062392754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b32282f10bdedebfc1fa8cddd4bdbf0f285100f30dadac9256e39522e9cdb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLC062530418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7add30afc686460a71e3de42a4963e63eff021b790a8ed9afc974eb74495196. 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/PLC062530419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b4d4d4083f7f21d1492ba8ec6f7c01d62b12e68d39e57607e8354fa29ad92d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/PLC062530420.