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 0xaa4f7d75824c70019b10dd85217cb139d6bbc2fd949789757cebb9c12f57458f. 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/dc2ed417-fdba-41b4-9bbd-66a2d7e08b83.json and https://artists.proofprofile.net/proofs/artist/dc2ed417-fdba-41b4-9bbd-66a2d7e08b83.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 0x4c7db0ab5cb112a71d6082c61786b1d756079e41f08761222b1aae4d27f8b835. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCACF1573062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19920da5901f9cf208093e18ff89f46ae4fe00dd52a1b7a6b89af4f4a4faad76. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCACF1573625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa050081acb2651b2ff3060fd5abab89544ead18740f60b0f8c9b1a93752179b. 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/TCACF1573626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b630586f92d57f373cd44bcdcf151f0c9fd532d931f85b711c0aceb6d2f38. 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/TCAEO1938258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad8bde03940f1d4c84f0330880eb7e96db8e60a18fc3d9c5066f350ce593b3. 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/TCAEO1938278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6bab39fe716823050d692a8df2c38a61258dcee4632ea6bf590224f9f21678. 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/TCAEO1938299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e55ae5023ae7778c56c769c39920f02081625e4ac9eb336382ca6ef80ea617. 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/TCAEO1938310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a6a11eea2a7878b87980159c382a7213ebfdcae36c2334f4289659b152de2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEO1938326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36538aedc72dbc34dd0513e9346ea1310ee59163e2ef44a934d3c2e132b60f1. 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/TCAEO1938343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0095bc474a7e098ab2adab184ed5473d8bc0ef7ec594080c1d2299c9159af2. 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/TCAEO1938353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3c972ec276c9d46a04051d5aa44989a7f6d37c9f0d2ea9f2451a6b28879073. 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/TCAEO1938360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f80c33c9502ad83f002acb724872201057a29e7b7378b83e7080b2ec5223aa. 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/TCAEO1938369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37213e24fa380ae8c44227648f0a32f08cfed7a647cf2f24482e85073325d83a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAEO1938374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c77e5dc69a87cbf5025d98666d13fb44ef508cdfbe716ca573a96546ba8647. 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/TCAEO1938379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf92899ff423f2cedd04443d10c4aa7c7a2475b28e4d8d848ca3164e95ce9df. 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/TCAEO1938396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec208c642c195ccba5ad85628723eb6075b2ade6c638533df3299554b59e389. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEO1938403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19fc07c9df2421fbbbe34dfaf79746b735f6ff305933358bca193f1829324d5. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAEM1997008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdfa49fd48c60de27b0a6c39101fca443f71467c3f94f8a30b0d99cb975f0bd. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZEQU2045483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4179816e98fe883dffea8824645ea68f0c938061f6b35d787862f09e3ff7164f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZEQU2045495.
Abrazando el Folclor (En Vivo en Acóplate)