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 0xa224baa13b6607f91d64f483bb8df6ac5ffe3af343c1f9767844f028211d0feb. 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/d6ad40e7-da0e-4e54-bd08-502385f3724c.json and https://artists.proofprofile.net/proofs/artist/d6ad40e7-da0e-4e54-bd08-502385f3724c.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 0xefad1593b4a61c418e3e808626fd76711e45e9893140bd2ac1cf6c5138082ec8. 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/ES6641900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc736fdad192a57c7c3ea157646a84729a737e8a221d3758925b3f8b99c237a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES6642000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2a72748d05693475376d26d3f9f42173b744ca081b0a4e3be0929074be4cb5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES6642000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc736fdad192a57c7c3ea157646a84729a737e8a221d3758925b3f8b99c237a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/ES6642000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad1593b4a61c418e3e808626fd76711e45e9893140bd2ac1cf6c5138082ec8. 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/ES6641900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d88f39e5e22ccad34b08a362ef8f3acd1f59b2aa16acdeb8e5b6a2d022f97f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES6642100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf598052474aca8baba9fb1b89d7c5797d16e626c272da7591c77cbf50d42db5c. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/ES6642100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6634f86c7583eb71a83e5e170d5ec24c580d09774830fdd20f4f7e0666a45132. 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/ES6642100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15112cba73588c04c25635f806c1953e9df9b319c77a5bf8d0a5ce3bfb744d46. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES6642000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb82d8ff27a43d63456491a77d9353b6d74b8b6b25e4c59a26b34a7de85447d2. 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/ES6642100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0237e3384e488a919b2251f2f7a8ea81d38eaf85bf980c8fed3decff85a88. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES6642100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a0820ec6c12c08db73c5d6fbb85940c90707152e0d7ce6955fd3dd4925e462. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ES6642300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8898c4913b38eb63cd7ea735374b9dfb5a6a6661d65f80de6f7853f3b79afc. 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/ES6642200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2242aed6dc61dca6ac3f88c882d5c6d5346f2b63b6c86482859f60c55a1bfb05. 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/ES6642300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dfcd3002abb41ad81347fab4d3b6a52eddd5b07a0a122723c85694277c0332. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ES6642300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21130868e74e5a7cb999340836bf9f4eb5983a74ab97a04fbc5af181f8113ed7. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/ES6642300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e89c6c227b30012a709ea20a7022f057b8bbb7db99705bfbf5b8c732c35293e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES6642200062.
Quiero Que Perdamos La Cabeza (Otra Vez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eeafb6bd99b0d9a8905d711e078b46dc062b02c0edfd9f511db8694a1466e0. 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/ES6642400073.
Quiero Que Perdamos La Cabeza (Otra Vez) [David Van Bylen Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eeafb6bd99b0d9a8905d711e078b46dc062b02c0edfd9f511db8694a1466e0. 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/ES6642400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44434decca61d625c851f6ec3b1aaed05be8d40a6474a4acda92062aca2a031a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES6642400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8dc2c171e91f317243fd6465f72a8b01f122d9fcb84b7a7e6df8116d635e60. 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/ES6642400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f1b7bad95d9f7a9f034ac9985cea3158a352891dc33a0f50d4e076d5a4d846. 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/ES6642100124.
20 Años de Viaje de Estudios. Un Tributo a Lori Meyers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d336f6680bc49211df42addbad97ee04403a1ec4da1fcfacd2f709d02e2476. 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/ESUM72401388.