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 0xd4d61f51ee1c235b34e11c563480f4fd4aa0c1105fcc7f260c6b06fc74b2d60a. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ca21208-f8c0-4cc4-a7d1-71abd13c2560.json and https://artists.proofprofile.net/proofs/artist/7ca21208-f8c0-4cc4-a7d1-71abd13c2560.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 0xfc5e41cc184bb30e5af292f07b89ad4b2e9e83d7b5a31414bd9890dbbf28154b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AR8TN2100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9912cf5e94dad2fb1de18266c2d1f176e7a326dcfbdcd5834e57b046f0baf9c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AR8TN2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b92eeedf968585d7a34b758d4a6d950e9b04bef355c1bf0725500bd3e1b347. 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/AR8TN2100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed8154adc7664e1d8c8b2179c4753ae30a7b358a4cf899de27bd8a1fe66fe0. 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/AR8TN2100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b92eeedf968585d7a34b758d4a6d950e9b04bef355c1bf0725500bd3e1b347. 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/AR8TN2100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f470f7672970f1e049b61da7b3381349828fea915f8a1d1906bf9ac9bd0052. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AR8TN2100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ff1827671cf65ac79920804702b159a3d389c24642e884a67a257d125cd7e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/AR8TN2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba980156d941dde50b116db9816ea1665b82d35e98047b589b9054136bfa4b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/AR8TN2100607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d352032dfb84b121f0694d1d303cc29368040db7a7b21ded48d9503e2ea34. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/AR8TN2100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27ebd1d0478a858df804776e4b71c85e8be6d973925bf75c59d7fa19fa6658d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/AR8TN2100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52ea4e5458bb22b8f7a5e1aa0af7a4cfd11b66c038ba691f1c47d30fa73e7f. 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/AR8TN2100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb0e923c1813544699091629b6018913fb418c476c6596ed943cc7e6b3487b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AR8TN2100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72658b1d7f48001ab315da7392813d92f6b0d9dd4df37c92002a93192aeb718. 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/AR8TN2100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd5ae5dff9ea6ec43df4b9d1f64a90e4e972e31c96c630d2f61016715a38227. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AR8TN2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085dcfc4e007c82fb196f4b7b64d68b3f6146c616cfcbfd65392c526f443f3f3. 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/QZNJW2269806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d3062cec15319e431dd49904506ea5be109ec2c98eed60f49b60926e12d475. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US7VG2399056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67400458af81f8b59ae78ba64df78112470d4a69dc6f3badaf3cd6c8d498c5f. 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/QZW9M2283278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c9337e9f1b8c9fde811e559209edf67e3b38c993a56e8b9d00f47f87091f51. 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/QZ5AB2343896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f166d7bdaf871425dd98cb0838764f6a42cc9fa1dfe601fc16de70d3f1cde9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNJZ2238011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943fd12bd445a16df969c35e3f5a0b1c520183e5d130bb85b5b75cd099048df. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5AB2343897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630693da457e57139e595409d943c086e96ffc4a468ee1b74d9aebf80882107. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB2343898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9345c15592fb58048d3976ffc9aacf84fb7530a69baaba0543dee2426852d3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJX2290238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba5f92c3c7c3ac196b47c168678afbd86116b75db237edc730c16f0fc9cb00. 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/QZ5AB2343899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1663629bcec700abc8eacc76bdbe3fbb8f1f50a194c707ff00166c475a0ec84d. 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/QZ5AB2343900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719f2f6316c4cebb3aebb779c7ab50a011f38b7211c5a96a5e4800eba17807da. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ5AB2343901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7639ca3ffd5f505936b986a2321d1e583a3356276c6c58e574e310a655d65e63. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ5AB2343902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3cb8d3555bd4e6309f419d4fb1d6db32f586ff8faf18b546e2b8216c1318fb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZW9K2296897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb88049aa15b9472d54e83bfd260065559ec07180695833b12f786cac8be7aa. 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/QZ5AB2343903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e071ea86e52ac386adf3697e5eb34991fd36dfbe8c9d9a12c84dfa145e1d3. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZ5AB2343904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e8dd748f3215ef09528b7f64521c8980d19855659d993427b21341a59f9ce. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ5AB2343906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ad9645fef095664728a3253dbd37cc93ee07a3b4f524c2070226c6417bef6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZ5AB2343905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97031aa5a506d665fa2264a77fe42810582ac92aa5a1c85c0b3012e454b1e66b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB2343908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7de807ba4f8bf8f76905872df9cc7a6c8216e430afd7cf209789bb37008f43. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZ5AB2343907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7752138ec466f9ff6141aa0fd20184f651bdfd35feb469ae644313a2e56d3. 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/QZ5AB2343909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ec89a14c292780b7036ecd7ba3e6de90781a7cb2a7de54dbb0bcabcf95336e. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/FRX452429259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c92c7b21288b93adb4aa104041a23943d823a95e5d992dad52f00e81ee29d4. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/AR8TN1900575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b2f8500f84ec29e137392c763e452136bf4d6d39cc48565960210b4729fd7. 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/AR8TN2100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0768064cd82fe66c90f29b087e7876fe88a113aa79e8d42c1fd01a27c0906809. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZMEN2011760.