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 0xa6e09b625f5f4f71cca58e32f84e8305a2a59c83cc1dba7d43d4d2a4f752d024. 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/31c21d16-ee9e-45ca-bc69-d7b57c869409.json and https://artists.proofprofile.net/proofs/artist/31c21d16-ee9e-45ca-bc69-d7b57c869409.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 0x889ad7c0bfcca7910b7b5556a14035ea28027eba42f8aecee9d022b97876f6c4. 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/ES5701900800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3551e204ccca39951773ea07b330caba9ef2027d3876ec684aef7cba34af2887. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUM72118928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974ecc14cac2417faa44b4f61a2ea944e8259fae9383c2702dc93cd881dc7ec8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUM72122658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a50e8be527f7fab0ebb3b1c265a648d1d37723bf9f6ef2a2ec31a9e4ad154. 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/USUM72204880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2cf3fe2cda81e12c383d178b993754adc334af8cd0508808c748875f332a4. 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/USUM72219618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa132f21b384fda4c0f37b68d4526ef13bcec0f66e77d4f5faea7d9d8c2fddfeb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USUM72301273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2cf3fe2cda81e12c383d178b993754adc334af8cd0508808c748875f332a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUM72219618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2045dda027bf1acc344cd831199b74550667320ea4ab7b7a38f71414dd141b8c. 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/USUM72209966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292a73975bb134ebd85a5fc973fd39c82a805330a18ace9becdf26edefc2ccdc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/COSO12400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a23bd03bfd5726f2c3d6b04d437e97f331e51d8b91062d02cfa4d5a2cb6acc. 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/ES5701900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a23bd03bfd5726f2c3d6b04d437e97f331e51d8b91062d02cfa4d5a2cb6acc. 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/ES5701900350.
El Pasado (Feat. Nabález, Los Nietos De Terán, Grace Guillén, Randy Ortiz, Kevin Apolo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f01ab4a2e506c8302eb7173818048d1b1c0b8cdb7ad6da25b5376139b6822. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USUM72221181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ddc117755faf709a9d77e74c480063fd5ce24445be3e303772455ffba7114b. 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/ES5701900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bc804f9169471835c2a99be869e7c81044fd634b270081c73e756efec4d23a. 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/ZZOPM2104425.