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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ceeaf08c23bfcd87407b458e43aac8c6e2228b59b735f7df525dd53421a092. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33f1691a-e6a4-4b49-a2a7-f22bdd8307bc.json and https://artists.proofprofile.net/proofs/artist/33f1691a-e6a4-4b49-a2a7-f22bdd8307bc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a46e43e4a6a94ef259a9122aa0cb4d884ba2374c9348424b6c304e36eaee34a. 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/ES8241473001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead771e4b46265225991499f6a6639ae2b9c2acc55e0439434b0ffb7beb9e6a. 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/ES8241471702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3e4cb665ff63b02ebfcfaaddb22b857e7880912aaf1ddbf9f548299140b68e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES8241473004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ac40da6020cd86a08a4843aab663d1873495e6676b4faf5ae1db0b6cf3ad38. 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/ES8241473006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a56011153266aa4cd9b3e4846e427ab3244a3a5f7c99626044708abdeea02a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES8241473010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2805b75ecec9c818da71436aeab4cc0f40737c10969e0f9e36d37bd04da1afcb. 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/ES8241473011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfacbde477c4790055e9b98876e7da900963c0fd08dd35d131ee7d465eb1883. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES8241473008.
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 0x8b9bf8cff7d7b614390db9a27015c9f7b0a3d7cb6f735d31079f14ab7e144621. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES8241473009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fade788b828141885d0ca1c88f47bd4a2fec5163768ae32715faa01941fd262. 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/ES8241473013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a69f800e7c58c449219ebf0152be5257bde9e714278c3938d1c4c2e63d9755. 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/ES8241473201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f95c67fd8f5e63869e76b588d661ce75f41efe2becc1e275a36e30a2f485f6d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES8241473207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a3d4bf687ce464d12f35a8814516d9ce8cf73fab428a7689b1d5ce8f215ec1. 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/ES8241473208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950101f6d164408c29186f5a8c75d42ea510c16601f72ee31457cc118f6e1de. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES8241473203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4401c5c080c171a8ce5a6181e3fcd8b1080169e68aaf42526a6f4519015b10. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES8241473205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c92d1059f59829cd4125d9699c31bca4040c1694100e75242ea1de0bfffa39. 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/QMFME1569750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d31c3e2d20865e695751b4da5bea666ee4f146c0e2b8a3f110280ee02e8a65. 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/ES8241470702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb577fb4a5defc3681add24f48b0b5968aa641c01e0efc658f23992e0a9e25030. 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/ES8241470713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a583c6cb855e3c32d930b3ec784d44f8dfc651e5f939ba3494150c71af267. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES8241470703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe210d7ab1a3f1652e28f9ad48322909d45c1b7b7445631183ab38156e6b6bab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES8241470709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f57596addfd64e742c57c5cfd2bed09b11733f0c51733851c244584ee7eb4dd. 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/ES8241470704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9b531bc74d53abcf248b4264e652ca6eb340afe2d499e77b105fd94d9ecc21. 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/ES8241470706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7d22786f3c60913fc44488a4f21e31d854a84b40ed2bbb5968bf06a86cb9fc. 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/ES8241470705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2b376b71ad41d8228fac9fb12080029877de6e5a55b33b3fbc6d7467c3c78e. 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/ES8241470712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab1ba1fcf39e615e6eeb03e86e6369a78d73905415451f794ffa7a40cb4f5f. 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/ES8241470711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878bc410d5bd86971eab65ae25e8aee08993474009eb7995fd67ee4ed636955. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES8241474416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79f4fc9cfc49c05fdf364a08dfbd96a24de71b813984d32d46169645e850d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES8241474303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45db57ebd255af22cb595b89513775c85470831161bd3d53242ff78e85a2bec. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES8241474309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d568a8c13dcd3623655c6393faea150fca227403c325d2ff1393cb3f4a06ee9. 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/ES8241474310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1e982638ff0b2cba3d35f70560ac48e9e32707f1d3fb3d41cb0212ae4f3b49. 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/ES8241474311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5694c655fc16f86c5282202f8b149cb06079fa6220e480eb788fcd11a03bf0. 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/ES8241474312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe580c6ecc90e19dc2df48d96f461f766296d70cf41a6c28aeae63d5c6ca67a7b. 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/ES8241474313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2accc8a3fa9dac8f96c6e0aebddc0be276abbd60e72bda58a38b38ac182589. 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/ES8241474314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406c8d522615c11f2292b28176ac9976710cca2dbd695ccd1052765c6975cfbf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES8241474317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8375b5ad67f4665cccc7222471de8972de67e4b6f98dbdfbbb9803140b0710. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES8241474316.