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 0x523445cedf3fdd3cddfe68958d2e94e484b5f90e0198dba37f01052e759527ea. 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/92d5fa1d-6efb-4eb4-80a5-34c506611dcc.json and https://artists.proofprofile.net/proofs/artist/92d5fa1d-6efb-4eb4-80a5-34c506611dcc.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 0x46ddc07ca5b973551f33a4d13cc1f3e316687898eee7e313fe5a39592cfbfb98. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:19Z), 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/RUB422002008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045a0306dd43c8a4a2b1e87546080668c88a631f93169e0630e5b3dc35de3750. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/RUB421303843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5bbe23adea50148c5a4c380f6805d98102122508f782110e0374a6b5739c02. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:04Z), 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/RUB421303847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837a0bd19b3cc92abb318d74a773d0db5ccf510a3b6960a5e18e25ab82dfbacb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/RUB421303849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3eefbde2e7a05dfd181dedb904d5e14c5c638c9b27bc2cf8180072a5f1983a. 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/RUB421304964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ef783c878316172853784c224e62ae1781c6a8f64ac716ad29b1f716bcb1f. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:28Z), 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/RUB421303382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dae7acd11a1f54373122d7ec8223da6dc73ec8e243740923d5d9fb2392cffb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUB421303221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba8cfdd40f6a782b7dfcf87d8fb12c9eff78100d446e9d3359fb51bbc04a960. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUB421305586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c82aeaffea956fef6c7694ae0166efffc23399f9e8e8fac2b0e125aa0df964. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/RUB421303208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e258d18decf511f645a2fc656aca21262a6a178323419af1fa0176569ba3c24. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUB421305587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5126c0db36f880f8656a17650f7f48d47a1116bceac7ec29212679d89fabf5bd. 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/RUB421308765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddd7801bdb1e08c77ffddff266919fe6a4eda2e6a156a9ec50906c467b70900. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/RUB731433567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b34c065f177b764335739ccf8751dbb018ea80913d52cb1b5647cabeac065fd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUB731508022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeed008fcd19db74230a271e1653c614a4043b2d6d075cbefe393c26ceed9bfc. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:37Z), 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/RUB421501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ea22593c9e41daa4fa6a612505886b463697c5327b2d6d255501dc08b7889a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUB731520843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afe2dfdbd0ea9d0cce52e8d590684a7d1ad4bc745d99a87497b1c45561867c5. 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/RUB421701406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa459aa479f4d78148bad2022a2205002f51fdec206d476bbfdc006fbb89195f. 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/RUB731586395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bb135ff4c3b28afb13bc5762a9a238df53cfd29ee3ca40f258e4af885d978. 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/RUB421901924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a95dfbc156418459d846127ffb677054be382e29ba9940ae959196a9f18e2de. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB421901925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ea22593c9e41daa4fa6a612505886b463697c5327b2d6d255501dc08b7889a. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/RUB731520843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2029a53bcd1c6583797e02f7096c84ef01cd5d4d1e004afaf618d7a408cf17f0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUB421800244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bd4774b85d8124e4e17c2f850c1bc70402f5421be2dda584d9f77f15e6f3ea. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUB421901926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff151e08c2a3427dbf535c1d360ec66d078bb64825839461ee54470cb4b58a5. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUB421901920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd18c66d82c3201030f08066c2b64b13046824d852352935649bb2cb3a08553. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/RUB421700918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec6fb2db9ad6566a5bb508177729bda58161315f5bd4449d71065b6706b0513. 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/RUB421901793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d52578c9ed6239ca8d5b665f798d6700947c285553fa8ea7cfabf63222155df. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:32:00Z), 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/RUB421800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1c643d4e2e3f10df074fd84e77d6fdba5e0ea6c9d3767474fde5f708af38c7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:54:00Z), 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/RUB421600556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57acb0aa761eb73ffd49310f3c3aec98f6fe2318300cb230ca32a5ca672bd6ae. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/RUB421901921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b64f44c58c322c05a0237a7528d419b0bd04d022398873b6c0328a349a6f14. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:29Z), 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/RUB422100711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dc9a51522bf637829493611c41fe20294b5bf69d3c467cf2e45a6e1cac6d28. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/RUB422202587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b0140f9213afd596411441e85510d21a69f1e2565d3aadddb09f125d24bac1. 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/RUB732027062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe7de9a992017f27f3205b263046cd4b84d6657e886a7f96eddade69a6fc1bf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RUB422403025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7442252d0f6187cb5e1e648638c5228011ff802c940b8b16a7a6bc71a7b64564. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR2X42239383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac71eea970aa0ff41490ae73b89b282066bcdaa1fa7a56817823717cecff174. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUB422403027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f032651eae49fa5d493238089ba851f8e2b1776e8dabd011e6c75a67579c9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RUB422403029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d0418db43ecc132726002a73e32d3fb7bae028afad85ff56593226bffe7314. 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/RUB632300924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe7de9a992017f27f3205b263046cd4b84d6657e886a7f96eddade69a6fc1bf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RUB422403025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d0418db43ecc132726002a73e32d3fb7bae028afad85ff56593226bffe7314. 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/RUB632300924.