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 0x5f8e41a148290f1a81f1f95a727b7e0bfa41f345c644f09e867d478861bfe7f1. 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/dc796106-9e46-4512-a944-45436b06f373.json and https://artists.proofprofile.net/proofs/artist/dc796106-9e46-4512-a944-45436b06f373.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 0x89bb539b42d66e3df42dc012db6e7a135fe7bc973e5fa23454d85d1900319906. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBCSG0300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b473819fc672d25f4c81ace42e18be05e7f80ae058380d4c9e2cee4a7e87cfb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBCSG0300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c373ca41a038b2aeac0b3f61c071320d0490cf423f81dacfc9b354980231961. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/GBCSG0300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49422f8939e1cb44c26842041c1a7bf9d9b3bba57e77bed2152ad50ccc12ac02. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBCSG0300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d27ef34eb3418882eefcf15003d57452fa0736e1a567ea15843891a4a35fd78. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/GBCSG0300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95f0c4d77037339afd91f7e9264d3a0f2da5c7706a0247c3000db2cb8d17d25. 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/GBCSG0300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f32a1508f6c93659e78c6e84a8d888f131ac7110eac722fb5388f49a9cc4c5. 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/GBCSG0300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58837851eb53b303934b686d32c803acce2172cd0b9b3536db565fa330fe610c. 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/GBBKS0200462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d758d8b3c8c13122a427dc968134500ecac263801965959ccc91f6f43d8719. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GBBKS0200467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58837851eb53b303934b686d32c803acce2172cd0b9b3536db565fa330fe610c. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/GBBKS0200462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d758d8b3c8c13122a427dc968134500ecac263801965959ccc91f6f43d8719. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBBKS0200467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee6d33d592e528eb43c65a23b55bef6803f3bc5337635ca2d523377f37a413f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GBCSG0400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f117aded19d1726e9c6e9fb32756ce70189bcf4ab48c6bc767064cd1a2baaa. 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/GBCSG0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a4d0681e30960b8e0d08dfd71195149912ec9e6a5705328a10ff9611d3dab. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBCSG0920001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d0d4872bb4b9ede8e5f97e4a820577bb741752d46002bd644132abeaae21ed. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GBCSG0920003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8c283628b1d83811258ada3e3ebea70964f6880906aadcccd870a52e36e420. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBCSG0920012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f849bc194932a22a158e1e571524a66dc3cdfd6b565140e17ec695aea3dfe27. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBCSG1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6d7b34719245374ef6868af8b04a5b15e7f026ba77cf34692afb2ec83f82a8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GBCSG1600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc10646186f5627c71e8f21d447d7debcc4e1e47a1bfbb4bdccc9d1fdfafa95. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBCSG1600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a206b34b289783223d8fae1edf613d44afe7cc073f6f697fef0d8f3be807c2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBCSG1600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a940b317c81646f1d60ec8d7c01d15af6ce44ffa7b9c3432d2fce34fef7036a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBCSG1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f849bc194932a22a158e1e571524a66dc3cdfd6b565140e17ec695aea3dfe27. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBCSG1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6d7b34719245374ef6868af8b04a5b15e7f026ba77cf34692afb2ec83f82a8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBCSG1600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc10646186f5627c71e8f21d447d7debcc4e1e47a1bfbb4bdccc9d1fdfafa95. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBCSG1600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a206b34b289783223d8fae1edf613d44afe7cc073f6f697fef0d8f3be807c2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBCSG1600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a940b317c81646f1d60ec8d7c01d15af6ce44ffa7b9c3432d2fce34fef7036a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBCSG1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528b269e5de7d62631cf2e068a4cd1211c4b3d1c4a6d1069a6cc806e63b1dde9. 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/GBCSG2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe27538ea362ae186e2f80d2c31b840d4d0757bfbf6ac02ff30ff761ecfd17dc. 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/ES8741824106.
Barcelona - Paris (Select and Mixed by David De Barce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319ce1e478324f8debbb09d0422d252c707ad34839cdec3ee16e1374dc6ccc0b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES6100220903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54db5186ba1861282c0bcc0f8d55493f93f40879c0c8cb2bd091d9dd359f015f. 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/ES8741801111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d2b7ed288bd5af9ef52806cd365b59eea8c5dad94a6e8e798b7b0c109d247. 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/ES8741708101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d2b7ed288bd5af9ef52806cd365b59eea8c5dad94a6e8e798b7b0c109d247. 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/ES8741708101.