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 0xa3660d63edccb51dc50f4d8109429b51a2148071202379ac8782330851f24b10. 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/2501b2ee-dde0-4105-bbf1-1a61ab90452a.json and https://artists.proofprofile.net/proofs/artist/2501b2ee-dde0-4105-bbf1-1a61ab90452a.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 0x577c29d719525256c3fb55687ec7a838e2c42fb4d9f02e7e8204087f4f10667a. 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/GBSMU7909808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08111f17bb79fac761d8a65edc69ebea8ba6021b1d9b550118d90baadf79210a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBSMU7909894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aafa9a521e52156f906a61fee9b67ad6de4693ddb98e68cf442ff3c9ed23da2. 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/GBSMU7909917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40fdad7847f8c38d3017b5dc9f232eb82246b3d0b33870c78201f07ac9bedc1. 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/TCADI1752516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271ed746d6c378ec29fb9bb1c388e78e11404441cd03be3349b8d8d44b6f883. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCADI1752521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d62aefc71eda3068d5c59c519e89cfe0e46d91b5718f7f228532ccb79f8f49a. 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/TCADI1752696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145f63229cd31e3153c25a5dcf7e4d42260a23b1b534552fc65d6cd17f35836f. 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/TCADI1752706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e84039afc2d46265e4ff3b081e817a56dc68f5cc9a31d0672c85ae721e7cf86. 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/TCADI1752719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698a1b120400b32b4103eb3d85b456332dd22160fac0d71fc791feeea6fa91c. 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/TCADI1752740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e74c7cd8c31144cf868af07eaea06084527eca072bfeeca371ca21d5dc4d8. 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/TCADI1752755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f29afa559063dfa0cfaa2b013ed51581fe1c555d7babafe4d59b6f14421e592. 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/TCADI1752756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf45bcb36f16f91f0fb1380454aac14fe6eec998405fbe298e7c5739d39bbc10. 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/TCADI1752759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e87ee60f61d13505803be92f8651674069164e057afe9030cca681a17fab4e. 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/TCADI1752760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b61a5028839f8716620fa529b9acda96818d754758ab2e2946938a68df5546b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAEC1900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab1ee6b792cf5e65d9a378bedb81d6c11b1804053767c2c1d190979639fd7c5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAEC1900262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f122841ef055f050a92f5b419434c83fda5d3a0c59c36a5f589ac7cfd169c5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAEC1900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd7856ab4af49e3d3cfbe502332f044e5efb7ef73e27d4c21fe0e026ff1e945. 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/TCAFI2151392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca151c4634474776fd1df99b750c7e12da02a74cce33e3496f7c7ab340e6bca6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFJ2123699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c8b60d47ba5a4188fe64f751ad6b0e7295ca784f4b4ec61b9a8b5fd26922e. 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/TCAFJ2123706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc8380c1ac3623292969e1172ad6e0b1562cc27ccff09c49fd3f45da2dd647. 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/TCAGE2201760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bfcc2451836979dd1b19d34ac4259698a37ce9b6fa6e911f1f1ac63d18d209. 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/TCAGE2252783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb824e1a2546e411528d61429ac76a38aa5503a9e38374e14a773be8f581d3dc. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAGT2323140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80363d689747e99554398c79f4ac40104154fc4454cfcebbff633a0c2e3b32cf. 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/TCAGZ2341324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d2914a7f073c32196fc1fd46027f3e850512a400e41f8180df6aa7df166bcf. 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/TCAHJ2382232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4574729186a0b1b299e8ff8d069b91817bc424293027915b295dfca7dd8339. 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/TCAHT2486990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc8380c1ac3623292969e1172ad6e0b1562cc27ccff09c49fd3f45da2dd647. 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/TCAGE2201760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee0261fcefeb95abb1ead6675da1985d524444b094c9778b04a9fb14c53bc6. 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/TCAHT2499113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3945ef634d6b08f95dbecc5f36c53708ad45b51082332308f54ceec00c165c0. 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/TCAHT2499124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf3e36921f36d5d7d77fcb5b22a7d9db50c0759084ec7549171364df5d353e1. 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/TCAHT2499138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bfcc2451836979dd1b19d34ac4259698a37ce9b6fa6e911f1f1ac63d18d209. 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/TCAGE2252783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e7352ee2de444069699ed0c0ff5e8a90ae369309f36a3c1e6d063a9faa5b8a. 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/TCAHT2499177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd1f607c1aa3a04eb8b55a2038548a9d92709a1a1b54ad83ad2fa01223f6395. 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/TCAHT2499197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb72982531d57f0d4ff31d255035872505e60cc28b87c67da821099967d8d762. 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/QZNJX2388125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9a3b9f2d92889ae687b62c8b75002e465224b92a413f34667004830a87a9b. 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/QZGLM2559312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6029597d0b6a5ac59d5d6d9d9ea01320fd25a65398e9f1460120a960bb34cab1. 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/GBSMU2838801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1bdbfe0996a0bb99a75b7b8e48ec3bc9bfd0c79d7a8fba3ec1f86a59e727d. 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/ESA011713385.