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 0xb82866a3ec5c79a09a680111aac01546f7c18e299aa19a5b0b09b220df9030ec. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4aed54e-ec4b-4e8a-a4fa-164025510af8.json and https://artists.proofprofile.net/proofs/artist/b4aed54e-ec4b-4e8a-a4fa-164025510af8.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 0xbb3ef2bab5c446bc8be6ee12725a36002376d15b44452f992bc7e64983d02447. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/MXF550507259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98a7aa17c035d9722381f721107a37a74b65ebdbc87db87917ef77475fea0a. 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/MXF550507260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed2e9b0d925e8027c16f5a1b539cefec1f27309054af3998dc453ed7c98e058. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/MXF550507261.
Sortilegio de Mujer (Siempre en Mi Corazon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830d0ef235a5a0083d884309bc0d804c7a1d1d6dc4a524d580f3fc7fb336a593. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MXF550507262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0e8eed4c9ca597d1a50efb5bf5fc0b9670ef27ebb8e41950a87707d5e9b3e4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/MXF550507263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0700adadc23eaa75dfd7d1dd40708ecdbcf2fb4108901eba091c615255a98e2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/MXF550507264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eba2b6fea860894b04176b018729f404bf72c7296ed071f3ee9bd38a5e09c08. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/MXF550507265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab98ef1db08d90f7513065ccb28253a736e8d66eb67246eb85b4eea8ab5759. 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/MXF550507266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf2582eadf05ba87bef19799150e409c6d62ba18ca3d6eb2cd8042e1d5e3e9f. 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/MXF550507267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e653128eca2234c48eec24216744a06d52015af1da5087e2bd7acbbee2ab4f. 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/MXF550507268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5205e0e86f1f8247842bdeb66f4b9873fda2c0a3488b6129f13fb79581dcce2. 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/MXF550507269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1b6c39f8f32246db77814d135ba2d92feeba458216de0ba84ef37bc9cbe6eb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/MXF550507270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c1b44cb7ef1f72c5347d4417105c89c4a373e934d287a69597d4b4d829c18a. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/MXF550507271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ed1b2862bf505d7919d3955144ddef9f3576284e8086159d643ce703f62c7e. 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/MXF550507272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf689e138ead42cfc66b0e681fe2727dc5871898efd11c0601ff7ffcb0bbfff. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/MXF550507273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b0fad571d28e4c6c7982ecd13831d456b776a1b0affb8dfcea9ef5b8f5108. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/MXF550507274.