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 0x2a889467c046460ed718882d1c930c9a8f29006da48900c24dcd618677aeef58. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da41613f-e38c-4090-8f2e-b419322a4e7b.json and https://artists.proofprofile.net/proofs/artist/da41613f-e38c-4090-8f2e-b419322a4e7b.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 0x2c5f9bc84f17971ffbb76f4894d7c9ef085631223b09047b7be0b5198399918c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES69I1900666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf18cca24dd29ce2db01bdfc762dcb329a443d925f9709452511225a5f3e82d9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES69I1900671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c051dfadfec8356e441452d0f2d4a307f65defe59ea393eaafce49ec178e1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES69I2201151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e819bdc32a627123a87a845d3b1212daf8d8a7f0085e164d7ea7b65337af7f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESUM72400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf870ec03ec2c6f752f78fd2a8e10ab3621ca9359cd833a525d64f99a690e87. 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/ESUM72400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d85d616e9341da1fadcc8a9320954107a2edec9dc71b07cb3184ad9eb3040e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESUM72400968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311a0457160bd24bb33dd954b126a3d463d6ab925688df6550815bd8cc51263e. 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/ESUM72401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f267aca7deaea4781aeb0c5b8506262b9d1d8850e73ffa404449e98f2a6715. 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/ESUM72400970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f4b1511afea3c156a7815a1557158f3e9ba3d47afac24396737bf866f2ffdc. 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/ESUM72401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb470cb375dfc10493060765b4103fca78a68cd61279a8d295dd3cce3cacb3bbb. 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/ESUM72401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59cfcea36d000c8a9ff4c27c61894034b17a9dee04dc3996809cfa045d787f1. 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/ESUM72401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687d1aa334ad7d560ac340590ee09c32ca67f6e37ab132387d6f5a0d484a0b5e. 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/ESUM72401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2782d10dc2a5f1275f2b2596e56742d682e6f0b5a93529e6c9e6073b3dfbde9. 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/ESUM72401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f443e52cd4a3c4865279d298dd7897a625ca9d1038b64ee4575ac4b182cdcbe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES33B1507107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97353cb0e22a59b298ea134d45fed6a2366cbd38c977cfab251d57ee1d42ca95. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES69I2401586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d01b40c6c68ab983b84cf81923abbec9e52463df34313b95801f74575dc2f57. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES69I2401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d594b89f74b07a05a0ef3e97082847790a0f2e1d80c2665b1aa0cfb75d04bbf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5302373196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b32bef86a8588bb5a970ad99a96021aee90d0c72885ba430f8eb6da53d743ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5302373197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ede3f266ebe69839a8ed361f765eb0668bea7faca2236830f5634b34c4718da. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5302373204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05259d4396856c575e033fc69217c5e1f34825ab0119e2fd6d1b12c4281024. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ES71G2106467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebeb86fb6643fa50b446bda61ee0685156b20028772cfc19ef4258f4233c45a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ES71G2114670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f66600a7bf0d72b8ce9184f9de08b635722b6b5266051ebc817e7732a919b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2110825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd6fd83e6ad43359ae82d1aef088ecd3ab62aabdc9634a234a7d894b55f472. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES71G2129359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3240a47ee936e4d8aaa3d58807cdea7afb16c3c3a3295d3f5aa2dd1f8e7c52d8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES5701001239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bdd874e0e0493dfc97baaa2c7c07b87ac03d5cab558bd27c31e6431d16cb4c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES5701001240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6443a20a763bdaa575da7be4de5171b4e0d434f851d8ea01bdd967539b2c6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5701001241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67428ee6aeea89747646066deebfc3a0b53e39dbf16ed3b638da87e3f92989db. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ES5701001242.
Ballade para un invierno en Mallorca "Op23 Nº1"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6ef1514779914bcca44d923fa303362f9c8c378566cd9aa8a79014bb100e3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5701001244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48e2ebce22e375eea09756e461de3d0bc5ae0aefb060bdfebf9a6c345f63ba4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES5701001247.
Clazz, Continental Latin Jazz Volumen 1. Live at Barcelona Teatre Paral.lel 2011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12544d254101f390a8054ab2ffa3bafd2d0c84baa311326be27e3b815653f41. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES5151101655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82df27e9aee41a0f3490955b3cbe8215c0bcc97f16c4f9054c94ca15349ab840. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ES5151101656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4df719e24f61d525ba96b45cfa7c698ab03f58ed2a05daa254a245e4791b758. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES5151101657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1854911b2ddf8153c9212e27bcf76f23093ae131d2521bdefb7b945381ed12. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5151101658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bffee9abceaa49689df630d64dd4733e63a53ece98fa961d2c58efc1fa3caf8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES5151101659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f877f667571f50fe197325bcf9b6080c70ac390d39c3c8fa43e4336ec2ecaeb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5151101660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c65fe7a6454798ff10a947bc46ead07ae03b99ec09a13fc2b3a5847cbfcd99. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ES5151101662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48005551ebad6b5427a22c89aee7ec327db566595b8bb098407d89985d494a04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOMMK2301010.
Música para una Exposición (Carteles de Artista de Toulouse-Lautrec a Jeff Koons, Colección Joseluis Rupérez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622627b86444cbe35e09631d198486c3e4874ac5940bf4a01f23998bf62f868b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES7350910339.