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 0x85cce66ed03c75251eac8ab471388fe3b527cc63eb3f70012bb26ec2d77a4d4d. 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/da4808be-40f9-4945-a9cb-642b00b0e66a.json and https://artists.proofprofile.net/proofs/artist/da4808be-40f9-4945-a9cb-642b00b0e66a.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 0x54901783340fcd1d4578502d4ca964d591d93401fffe787576a6e955391ade52. 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/QMFME2068489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1e7ea183b70161470c6e549aa4a59621480c60828e1cb7ad9250f29e5a43a. 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/QMFME2068281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c82771844c7847a8fd82a0e5e01d5c1f7d061a9bcef895e28d0d15618d0d53d. 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/QMFME2068103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8675fece2010527988077403d258bf3d42faa6fa280c9697d7e35e8db4aa4b8d. 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/QMFME2067612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e96fb1141be96e82bbd36f67a1c7ba2ab1a4ccc8976b20c769f92bcec40114. 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/QMFME2068223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff690bfa4be4f41976939e68c25eec700bc3d20bbd40c2bdd11958b161ea958c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QMFME2068445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481599fe5291ae8cdd37ccc52ee57665e5a8f79173ea784f5e80ab98e5bf4a23. 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/QMFME2068168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca3490fa0b42b1a6f9e1e8894630d4d48c0a5c9ed51d15f90099c445f96bfb2. 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/QMFME2067751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349e8a5c540fb80398569eea49b3982117f169099272899657abc4cdaa44278a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMFME2067714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b88d5022ff3a1b2080e549f1eed4581ad9378abdd508c93c2737feaf0229ec8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMFME2068378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bff342a869b4261f2fd0979a5d9ebcff09c992a98fdb9d7e02821dc93cc221. 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/QMFME2070889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7ec50d9054aa9e6430a6068f0ed10eebf6872b06de7c42a6a070e297a31457. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMFME2070958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe335d8833414c9a784379c07d6a6824bdc21dfab8ee0a8f086bb6d7f246c737f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMFME2071118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86be716c70eda31269971566423243ad787128d585c04053248eed5a8109b486. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMFME2070847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec4beda23d5349119fd920538a53a7a3d18f35bdd61091d7a62cba0bf99db50. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMFME2070830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf307ede52a5c1ac084ab5fcbfc6880d76a9e7bb6ab0d02978fdc408c2f11880e. 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/QMFME2070867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967f9a6e3379dd1c4e13aeaf411e547da0df701c4bcd81e0612627fad6338da5. 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/QMFME2071411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cadd451214a70529575be5fc25a393b1c2dd81bcc3e9a1f2b680afb35c659f0. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMFME2073972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f715b5ff4277a8e88d35abe0e345ca1dc120ade8075ccb6ee71b16542dadc. 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/QMFME2073923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720bcee91f4312f096478328d3eac929898440d6f7c1d49204c177b752d627ae. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMFME2073788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe5ad8ccdfdaae8a6f0d573002202e3ff02f90fe33f6444f63c61d8031fa3e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QMFME2074218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6740c2b967280e0153a05822ed13876cb5fe9b5ab3fe4f6589ba4b3eee1d2c5. 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/QMFME2074012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7719e65dcb98388682dd752264a7b00c8e8184f10107b04a427c2c3963b337d2. 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/QMFME2074376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcac38894a4bdceda1208bc0d796eafffbc32a3aa12fdc0c0a4c321dc28824cb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMFME2073556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b6f8ffe83146983f26d0c69aea866fac7e1511432a9f95e6453ce21d1f346a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QMFME2073612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7a883146964edf2cde08126efea9eb1a6af087d341cc406d67dfbc8813404. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMFME2074311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f005ce7b7c23d6b803150f42203afe25b5b58a7c9df28dcbb9c19a859050788. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QMFME2073996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7172faed0e321e78c301daa04276dfc5f3817033b66d883f0b03768dc57c75e. 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/QMFME2074251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648e12e530b5afb621db2c11b12df42778b39f02aa7889348e07d3ce874470c5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMFME2073949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb730abf44b2293b0a68bf8dc6f99654dd6c5e4194a6506eadedcc66db1246e8. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QMFME2073834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98dd9cc7451cb3e1216bdc5bbb4993a2a6ce188cc8b7c581991d54cb7ecd56f. 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/QMFME2074243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653c6b6e74a8bf08b629c39aaa62e172104236050fabd6d82012fd91a93ca704. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMFME2073760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756131433ddc9106494b6814adda987b2aa0a4f338b7b74e971bc489f5d046eb. 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/QMFME2074289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065abb12b38ff0ad5248148deea281b7731a13323c78039bcfbaac0af5269694. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QMFME2073595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe487d1b7085a4f0b04ac2a37ce9cfadb16c4bfe0667aee2e32e190749e84f4e3. 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/QMFME2073983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7bb45077a4a22f30801988db17bbaff73159540760f6f5fa560b0ef0cff9d8. 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/QMFME2074364.