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 0x3d7054d32f06d147d7552e887b2a5be40547842a58be4d7deb1a1a8587ea18b7. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4f5bd8b-b377-4f7f-b1c7-7c085703affc.json and https://artists.proofprofile.net/proofs/artist/e4f5bd8b-b377-4f7f-b1c7-7c085703affc.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 0x9a2d394140a50f7661fd1c2b50c8c88a6d061f33e3067f87e519207df18395b0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7U2515961.
Quando Jesus estendeu a sua mão (Delta Blues Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1217d793616ab73b3426cf95a87bca3a81bc1b806e04cb218b323b6deec8f8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7U2515918.
Maravilhosa Graça (Amazing Grace) [Delta Blues Acústico]
Maravilhosa Graça (Amazing Grace) - Delta Blues Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc048c6afd7d22429dde6f7852e773552dcc00af1fc9066d651c1add6883b0e1b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7U2515915.
Coletânea de louvores evangélicos vol 1 (Versões em Blues, Country)
Quando Jesus Estendeu a Sua Mão - Delta Blues Gospel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534d7652e0e9a95adcb2575e9247bd555671860bfa49f41facb0a0079a29bb6d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7X2561544.
Tocou-me "He Touched Me" - Delta Blues Gospel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1217d793616ab73b3426cf95a87bca3a81bc1b806e04cb218b323b6deec8f8. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZZ7U2515918.
Maravilhosa Graça "Amazing Grace" - Country
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf649a4b62be22341e1af96d231be49d4799c71cfcb57e6b3e59568cd5c93586. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT3F22597656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105fe260eb60e53e62db809c7691a0a5c1e0c1483d89bb7a53f9856453f4c68a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F22597657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e55522d97d13e67167bb978178837549d607305a6f86a249fbfeeee6e1b84c1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QT3F22597658.
Consagrado ao Senhor - Delta Blues gospel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adde18385e52d99d7824ec0aa251f26b0bdbaa5974b804baec09f10c775309f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QT3F22597660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4db98b64ad5245402b1aff5a37f1136bb7904334701fd5257901aa20b50d11. 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/QZZ7X2561558.
Maravilhora Graça (Amazing Grace) [Versão 1959]
Maravilhora Graça (Amazing Grace) - Versão 1959
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cfcc976cfb89ec3ab63aba0e76be4c425cd4b4ea9dcb2b142452b935e40b9b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT3F62537311.