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 0x00fd2a018d12e84ae3d95363066e7ca45aac0c976e83fa2fbb74cf1d80289db4. 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/4942847e-2367-44c7-a920-88ee74d5362f.json and https://artists.proofprofile.net/proofs/artist/4942847e-2367-44c7-a920-88ee74d5362f.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 0x3c63ef9cf79c78575887a6b48df5a9d6f368d8e292cf09b522a507b84dd44760. 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/CA6E62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4a5d9e972628df9832ed45dde22e07801349a46321fc65d24186bf2d3a841. 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/CA6E62100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a517c0d78f747748985717257bffd2381b4d76b938b2e4df50d648c14e2fd53. 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/CA6E62100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9bd60b83872daa4cc03202c09a68b1120b7e9462fa64fc2fcd58c6c8d776d4. 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/CA6E62100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa8a98cd8b5a5a25bd2e7513a0a0d96edab75f5a106eec49c2c8ba9e219638. 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/CA6E62100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae9e5e452d0dd4c050461d4e0d69ba9ff43f17eb69f5648462f94a857d3b7c7. 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/CA6E62100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223fef5f02abf93dc39897cb213f2b8b5dd3293215cd440008ae542489c2c85a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:01Z), 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/TCAGY2388785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c88613956df05ca0494046a46b802871c73240605d0d5a2bd17f63c6517580. 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/TCAFH2085260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65021160e2e2f0fc9a0121c91cc29e4c22717986ed19b4266ea3b65f4121a0f5. 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/TCAGC2203064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c88613956df05ca0494046a46b802871c73240605d0d5a2bd17f63c6517580. 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/TCAFH2085260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c70e79581e801efd541aa21e99be7401a769d52f9285627789de2f3ee9364. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEW2073892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e1b055744c1354f2bce5206d0fa306a0ecfe14f92ed3e3f7d6daccb0e428c5. 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/CA6E62000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e1b055744c1354f2bce5206d0fa306a0ecfe14f92ed3e3f7d6daccb0e428c5. 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/CA6E62000052.