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 0x803e6f182937b3fe54e9e7b4e95661b0c38e9fad82a4db3ea51f4af038ff050c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4382511-a409-4a4b-8655-0aba6f7cfe66.json and https://artists.proofprofile.net/proofs/artist/a4382511-a409-4a4b-8655-0aba6f7cfe66.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 0xfca24f7a0455b36c4d95a871276881ce8fd55e5b8c70d480d2f378b7136e6f64. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:59:14Z), 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/GBBPW1100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc9ab5bbdde172cacda9614da67c7cfb3b28507c31aabfb9073562ae2c2772a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBBPW1100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bc88ec03ca59c6fbd642161c1be137c2e62b93621f2d9690f8fc78b4a96c96. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBBPW1300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f90d4c129e67592295d27ebc49b368417fcf377c0fb9ba9a48ca5be7049379. 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/GBBPW2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5ce10c9ef7e15febcf83f6f447733da1f0b99a1f95c552321d7ea910fce56. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:22Z), 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/GBBPW2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f90d4c129e67592295d27ebc49b368417fcf377c0fb9ba9a48ca5be7049379. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBPW2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f799fb145c1c9dafd509b4c29a702a7434d6c6d6eeb24558cbe0c36dc5074f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71605994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e378b67ca89a9ecf95cce8af226edbab65caa95cc29deea50e112a5ccc35dc7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKZV1500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f799fb145c1c9dafd509b4c29a702a7434d6c6d6eeb24558cbe0c36dc5074f. 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/GBUM71605994.