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 0x9add9a260f63e1a32944d7e892bf5f6ee3590c2abb91ec1d7ed684ebf78077ec. 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/59f42f23-f420-4593-b4e0-a4846509c30f.json and https://artists.proofprofile.net/proofs/artist/59f42f23-f420-4593-b4e0-a4846509c30f.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 0xa857731a6d6f1f50e4ae534e5c4a69650b8181fb79b4a51fb9323372702f4a69. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEH1908098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e7ecbb6d9261864a4ecd448f062e0080f9065d49afdf6f1473da340078eba2. 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/TCAEH1908107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58209d87c615a6e331a24baec4e6de8ad8b4355e5cbd4bb30daa8605b224cea8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEH1908114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93835e85a6f3182a63ec81348677a4ccb18f693c98fecdb773c6fd0d22bd478b. 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/TCAEH1908125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae09a7309136cb164b416320c9055a846aaaf5960d671b7a07ed9c692082c1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAEH1908131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a02118251acf72c4edd061eda06cae41e412e991a6e690c0df2a6382102cd16. 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/TCAEH1908160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce99856111c216ec2165f4a2b7db85f73acaa16f08c62cb787c30237d246104a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAEH1908167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ccf9cb219273e5c9380eb39988690728166d6b881a86eab07dc36a125c410e. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAEH1955965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6762d285c63313cdbb3de951e597d11dfaac6cad1f1c77bf9794da5db12c994. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAEH1955975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d98ff09b8fd661191210bdf4f7b51fb97e903a59e5391d996660146ad49ba. 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/TCAEH1955977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c16c14700a3859b71f2c287f9dbfafebf1591d295dc2ff9a9bf0ce4c70cfe. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAEH1955984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2781998035fe2d1f54ee3906736e158a550f9b3f51fa1f8207fa0ec0d0aaeec6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAEH1955989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a92f2e9923399d2043ea7ebdac29025e5435ff44dacd29165ea947ab52d368. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEH1955991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634c5075f49a674c82fd5201bb4331506c56c9a3a13b5f65a8baf15f6b5fe2cb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAEJ1911637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b206cf1cd23e7e0316653dcab00e7af3f0380a38324ec1dbbcc659531c93da. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAEJ1911640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5092fe70322102917c6f730ccb47f7cae02abbd8687e9548bd2948d8c18a41fd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEJ1911642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba7376c36d070de880e87598cd3a2f7cda534a40fc4e70b136a679ef41fea4c. 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/TCAEJ1911647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f6f960e0cc15e66177c7f7eb4c74959da9553f571013c2c14aab8006c6077. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAEJ1911648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e2358957e8a0aec000a67e60e37b161109a6f62dad6fa394c925a8b0bf5ec4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEJ1911649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a818f7086e3062134a082eb39c259e11fdcf77d1ed16c72c4a5fefdd630c3. 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/TCAEJ1911654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11c5edde48b3dfa18cf7e44640953ca4e402740e146dd5790b690a4f0668cb1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEJ1911559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b13e6fbffb425f23923bfab590811764bbb2cfad42f4a5960299b1f385a7839. 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/TCAEJ1911570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf8fe0515b2420813c890c41ff8778e8fc8b7c555b797479a6b9da97b79eae. 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/TCAEJ1911574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af35ec574cb4b0992669932bc997b9506dc7c156c06adecf14356dedc23708b. 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/TCAEJ1911577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30817129ec97eb0eaa7be314223aaa6fdcc7efc53e27b5bdebf69c479cfa620f. 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/TCAEJ1911579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dad51feaeb4fc07a7b1de47fec8211ae3260babb68e723904623beb42e85ef. 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/TCAEJ1911582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e85204ebe82ae309347f76883c870bfcac650a529c3f9b10c926809c97b3e6. 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/TCAEJ1911585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b69211297a9d942efe9eccb15ad607fc34a1a2c3183c49c2d341cbc1f8e22ef. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAEJ1911588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f732154ddaf726740c3a2d0b484bb14203f06ad377effc317d9d84e6e03faee. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAEJ1911592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a88a654587280e763374398b5b6ddf09bf36cedb23b8bf1b2be40ca67aa995. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAEJ1911600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cb8b10b51acbfb90a9d1da0cb56c81f041c24fcdbe6793d256f0a117314f5d. 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/TCAFW2157852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040da30569a19b8934c617cce51024461c89b28d38cacd46086fd194f485deb1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TCAFW2157866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb249bbd9bfc62fb169890ff6ec835f4bed2be0e19607cbfb73f31d70d4b375d2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAFW2157892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa750d0b6532a7d924661858c9916f2bb562da7ba23f1b4b6ec9cf8a3725d831f. 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/TCAFW2157889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab26f46adbccfac21566bfbcc05fb844ee7d9cd61983540ccafcdcb9451137ed. 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/TCAFW2157886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b25aa637ace8dd1571a929b6b1ddd4db106c607095fcbf69b3250a50263cdf. 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/TCAFW2157897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2dafc1ea1b8abb910b58e947fd6de581bc4c63aea063f2bc361bab2c8f9d65. 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/TCAFW2157901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190fae1a9028398dd5a91d5d787c445f8c3e56f01d5fa3430871787be1b00d0. 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/TCAJN2550535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76acec9bad5fefd351ef6dafc7c62cb2cfb595fcd804fd204476357b95ab5bdc. 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/QT65W2571471.