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 0x591b5527b74bd0ab602708b4aa0f4dee058f82241c968864c7a2740197d8ca46. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6dd96a90-b4b8-4276-8c2f-18327b3bd2fa.json and https://artists.proofprofile.net/proofs/artist/6dd96a90-b4b8-4276-8c2f-18327b3bd2fa.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 0xe307ed964227066f98038b50930c6ae068e78d5662c819749b26fbc8f440eff5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARN361100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41e58479b76ad4307fa43e1b07ecc0636d2c1b78db57fb2253bc621943f8777. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARN361100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d0bda27ba13c8f572c0afed358fe4f79e90c52688a038515312de2ee988460. 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/ARN361100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f71eec82a904e5c2adb5d0d7c30e0414193678e465c935ef7d0bd704fa29e7. 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/ES71G1924109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8d54b7d840d5aa34c51f706fa8761e65e3a93fcdb6aadda9568604c406f906. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES71G1924110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b7f774b70907c31142d268b5872d7ab87922b695e002fb39066bbd72dfd8ba. 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/ES71G1924111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea812a36458d1b8f0b0d9f863afc5f93b9994d6514dd38412d5b398f3c23454a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES71G1924112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f34284b0f1f2580229c6143dd79cc94668f4234a9487ccc76d7bacb6b812e73. 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/ES71G1924113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e13343690d7acda04c8f67c8335896d517835bed3a220937f68afe77968976a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES71G1924114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e3d759a81722fe38d6a5640e826aaa709471089eaf87db3fa488b409e42aaa. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES71G1924115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174d46035c7b1262b4c00e87cfca8f02d386b16f2840491c02e2d2eb6838476b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES71G1924116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc75304bc7ac000b61be1f3808e20b8ccfce08b8b2a6bd328edb44063cf5a4. 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/ES71G1924117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187d9f3c5ee63c3229e234144dc4ec5f5be83cbf420af711de2935492d293389. 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/ES71G1924118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dc959164ea3869a9938856bcf21473bab9f48e029e95641578f39aa6255570. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/AR6841600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a8ac0c07f12489501a4b12085cad97985bd4fd3b269dd2f3e76889f563dbc9. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/AR6841600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d96f2dd2eef024b49475c83ad5165e85e35f5c52d80d198af0b085e12ccd0e. 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/ARR6V1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bebb35e588323b245290de8c6d519d6e09148c52fc3ddd49f56936036292ea. 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/ARR6V1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038804994a0a5d081180049a448204d6c8d0f5bfa1ec442c0952dbbefbec381. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ARR6V1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeabd36a30e043be75d7c3e83b79af95be0cca46a2fb32055f7c037138ca7185. 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/ARR6V1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad399c97db52a72c47a7791173b97aca06a5741b2ddeab9a5e8d2b0aa559f39. 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/ARR6V1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89e114c5b4cefa51fc7866fcf2ed975b25c3d1b7cde63c868a21bd85d5b328b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARR6V1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d17c713c8d8100b2a8622cfb8e6cda3f0b865a292e02333d32e97aee4f4e51. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ARR6V1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352646a9043e989ca2c47adb64e6e837b6b0cfde1c6499e8c0e425c6a5221644. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ARR6V1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2105ea4581360ad9e51e7a4f0405fa86b998c1c662e252f0e2d0ff0f78985d. 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/ARA011100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a2b47cd2bfb340c0a28220aa3ea696e81193277b0fd24c38b9c22f57733890. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARC571501154.
Diatónicos Anónimos - Música de Flores, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d7c8c7b00abfa08311bfac9ea55b64d5aab64b27c1d53e1eb6750765252dc6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6MZ1741569.