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 0x71b22808bc462649bada9ae0203870bc589b34bff3cdf2bf176a41c7b52388d1. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36066e66-349b-4013-bbe7-41f7f41240db.json and https://artists.proofprofile.net/proofs/artist/36066e66-349b-4013-bbe7-41f7f41240db.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 0x196c3591bb52c5dd28edb7c1b2d71caabb13a1237327436ea265f94ae669c188. 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/ES5371400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31dc71f6785c7ec5890717fdd8c2b2e97e5a02c555e6c34e17fd0cdd665807. 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/ES5372300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592f1c9ab1c94808421a34c80bd5728d266c29a07da3496e9ac255a006eacda. 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/ES5371400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008790bec683fde6faab603e27212f74f309b8673516ec384d024007dfbd4c24. 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/ES5372300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e71803132534c402239cb6ba4f913dcb54965480e1785c5edf894c403ab8b9. 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/ES5371400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42009b0455ce40e03538b3b42081172e93073d68c70d0066a438ac232a9c40c8. 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/ES5372300127.
Diana / Oh Carol / Un sorbito de Champan / Es Mejor dejarlo como esta / Llama / La mas bella del baile / Compresion / Black is Black / Los Jovenes / Fanny / Winchester Cathedral / Tintarella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba2b770e22f103d5e2d57c7a5542f313d14dab99bbff41de2afd1014fc77aa. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ES5372300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda95dc67edff261821e463a044378662132426ec0d2ace0a946dc107570ff51e. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/ES5371400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9098774930b0edb16b2fca27ef5242a0a4f1717eb051e092919fabc6bd1e124d. 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/ES5371400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce74ae2ddc00463d7840c912984e2f1363ecd0453568f1c4c8d0cce852d77b7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES5372300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3088f7669ade7ebc6f390897de24efdf91a231dbf7b3ad10a4e8867f7fdb9426. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5372300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b170b2fd617ff69d36a4c65a8edb3c2eeca5054bed9af3433f86793a6819fa. 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/ES5372300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29585d8842c77f90c3191182d3b959203e7ce41aa71e0c4658c3a9df85f54e11. 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/ES5372300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8640c8b14841a77c4378350261aa6d818dfca1b372e4e864bf8df76de64d1. 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/ES5372300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df328e426907e87ec737064490da6eb0eca36332b50fd6e63ba0aa297eba46d. 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/ES5372300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fc09cdff51495b862fcf0b836330f86553ed8f2e3c24b2f60a1bc1441987b2. 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/ES5372300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bc7b9b2e416e1f11eb8a07d28e452417bee3127eb63c3cb0795fd0d3cff767. 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/ES5372300135.
Solamente Una Vez / Aquellos Ojos Verdes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32db0e4ea40e25d5b25b9e443a279da8436e220ceeb1ba0844144eeb611f135. 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/ES5372300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce4ce1d9bbc8e23ef9f948732d8fba496cbc3fbd5d9715f047386cb85d118f3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES5372300137.