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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 0xdd2ab43395a3147c4ea3ef82fc2cbf964e92e8ca992daf6950569542b85bb184. 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/54352ab7-c990-46b4-b47e-23e626c8385e.json and https://artists.proofprofile.net/proofs/artist/54352ab7-c990-46b4-b47e-23e626c8385e.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 0x6edbb5a175e9bd0a6ebbc1475b56ae0f1b0c5217bd47f52ac741c07e5576a293. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEUT71600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10cb32626560cecc215c77147a3781c4d86314ea30a4769acd416bd7a8f50be. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DETX91500781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4141a7731c88140977d58e36a4376c68b90917d9c82002a683791cabdf10e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DETX91500793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b118f1b6ea3e3bd6aea15b8b99f6eee58be10757036b9da4f2085d6ba31f1d0. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/DETX91500786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c414c949f29170359f3b636f16337ed67c260b6160d179c0d91657b8abf858. 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/DETX91500864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf81d7ea6dcd118ae2ebcccf1839f0851956b2880655f27023fcc8a9b9508b84. 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/DETX91500828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023456b1ecdb09b538794ae33cb7144636a4b9b6ce0d19fc384f45c0aca9126. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DETX91500829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a785c8ba27e235529fc31a3bd3653fa9227c4ce9b31b01b5dfc3141bf010d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DETX91500832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc94e56b7c11d2ad61842d0496917ddc5e1384c8d800ec07559e28e4526eaa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DETX91500796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f7f6ea35dbbc457a227ca26c10d50489340529aa1bc86fcd54426d6d4dac81. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DETX91500797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b32c58e44f70920b572a83fd8f2d071887fea1a521f36478304cb2558389f9b. 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/DETX91500798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8af414e07f064392d69f3be64e0121733af7f9c49c76a9004f9d4b8c4567eb2. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DETX91500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc917e867e1d55f0421daac7973a631533aca8cbfd7f98083a523ebdb6d069. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DETX91500865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd8287f0f3364c59cb98716bcfbdafe921385b6f1c7f39eef5782f90e2cf918. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DECE72101734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede72c8ca123a2bc846aad2dc020d4971913e6ec2f6c8501b140619f9f52d73. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DECE72101736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef9a3549b4d66b8d3f324b5cf19e7b53313a94cddcaeb54c4b4b1a37a1131d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72101738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1ef2f14a8964b43297e36656aa138dcb4add8c3b028eb321fd2f541790f842. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72101739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0413de2c2cb6e26a301574c8d11a7c72927b42826f8ae1af2d58e704521dab1e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DECE72100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd247056dafee66e0869475cf9dbac00136b8730f6379726a4879cb5cd6f296. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DECE72100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7978b318443cf502afccedaa50fdf309fb76b0105b8af63b029743643c1f16. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DECE72202244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2caa817c43503c570e4a324a306efcc42f228fdbb1e5d0f92cf6355ae82462. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DECE72202262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56176b4bf190bed7dbb35b4ad2d8e995447748781915ebc3aa12b5c07b6d3962. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DECE72202267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650a4eb68eac000918653313e5e4f246e5b12ed32b4a58930bce08a22c294971. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DECE82400857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bae47d49dbd0751a9e77f5366d9b109df4bdeda0480a3fbea7f85421ae8ed5. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DECE72402504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49c00e67a4e100ac3ca4cae284782cf48dcd5c141794368bbe7a827f2a47b5. 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/DEVY81700602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49c00e67a4e100ac3ca4cae284782cf48dcd5c141794368bbe7a827f2a47b5. 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/DEVY81700602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5438e1d46f94bdfaf23b047f07a9b801f1d9ba1d2358a3784ff5749b39f5d91f. 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/DELV41600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac177640ec1e333bdf77d3c4b51601573e5423b2994383f1e2aa181ded2f7cc. 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/DEVY82300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac177640ec1e333bdf77d3c4b51601573e5423b2994383f1e2aa181ded2f7cc. 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/DEVY82300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eebf784e326c15ef020cdbbe1f27e698de2eafe200126ddde2a161f0c18f446. 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/DELZ31900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eebf784e326c15ef020cdbbe1f27e698de2eafe200126ddde2a161f0c18f446. 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/DELZ31900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1dfacbc3b0396b238c70c2becf0442df60a938d242fc7970ad8138de396f33. 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/DETX91500482.