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 0xf3b34a47e2cc3d7e24a49a35c6f7653937a07ed404c81aad8b53631a7fdd5a99. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc013683-4e0f-48e1-9be7-333e2c2cf9e8.json and https://artists.proofprofile.net/proofs/artist/cc013683-4e0f-48e1-9be7-333e2c2cf9e8.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 0x7986545fe2ee14796c9a4a685e3625cdb8a02eaaf596e3f0724b21c3424337b6. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/SEVQU0500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7111a52914f3c1f631dbabade22b44e037d0d1ac7c093c90c1b5c1fa0c824264. 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/SEVQU0500611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d7c9fbcc69073d8441f5312d025916919cecdecf2072121ab837f43affc57e. 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/SEVQU0500612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a480bd6fcd97fe75c09ce0dc4f01eef0469d965cdab4b5aac6016e37e916b76. 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/SEVQU0500613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf547141c382c02a367b931dfc9b41b6c8dedb5e3abf44b5eaabb9f9fd2e04cd1. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/SEVQU0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d6b4007da8a3ede584cd6db5541d2a707249a1ecaca76c772814d5553fe88b. 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/SEVQU0400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b205bfc8eb65ba1d7475fcf619d2d0785cce6f74aec320822f836fe5465d952. 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/SEVQU0400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e7b7d0f1df27bfbdc77a40d878346ace6ce3565fc52ec9fbb5c0b45fc96ece. 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/SEVQU0400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45733d60fb90d4f5638dbff6e409bb8a3d6728e66bfb2a2f5701e109eab4ff62. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/SEVQU0400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c2db2a7dad17628a243c116f95b71252e620e83649e2df979e5974ce91131e. 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/SEVQU0400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86cc5d0fb30a1eb67d9c2110e82c12cbf96d25321a483586ed6c2ec57aa983a. 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/SEVQU0500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d367e09f4f637ffed82045f7c206c95f05466b05cfa22e0def6ee4517b8215. 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/SEVQU0500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b51b0b13dd8841117236b5b336762ad4f3cb18d29b77f627665d14580bc9a3d. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/SEVQU0500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc530e10406dcb53842d3574ef15f9b0d03b5facbbbe54857d6aea7d43d223e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SEVQU0500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a621d01b8dc8730941ce6fc16d1ff957b9e3cc9773a22ec1183fcb0abac3bf. 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/SEVQU0500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333f19318daab19020820e4c8a3d439b6c6e713c1a31b66f9d4884ec081809ec. 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/SEVQU0500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5161c3aa6a736db0f5bab6d0ee9eba0f65afc7a811b1b8365b65aa694120a7a1. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SEVQU0500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd66f973aaa41774e00e9c413fab6bdf660c2c1a2c726070cdbe1a13b1dba9d9. 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/SEVQU0500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9798cb00f27c2ede099e531af6643ebe8b7744b128557576e5d77b9a12884aac. 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/SEVQU0500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea35c112856d6f253cd234d9f8b03c7859eed0dc80336856ef327c41450a2889. 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/SEVQU0700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f64163bb5f0df0a27d5999cce7d0c0701f4acbf118e3142519cf4cdd01c153. 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/SEVQU0700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ae0b1edb8f5aee25c29fddef7c0d414c604ae8051ab64c0f2d504ce1dfd7a. 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/SEVQU0700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3def0846cf2a2937e8f187992099103f8b3dc33bb1d02733a2a4c664febb2a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:49:38Z), 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/SEVQU0900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352e21f1163c8af19689e4c1a1a41db15e14fdeac098620e7a5720952b878c27. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEVQU1301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b32352d3871a11fc30348e9abc1756cac7ccedfb8b2f1c1063f9bb81ee55b9. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SEVQU2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e372befc775c4a42c5787fca93a7c5be9287becad0e98a2fd45d1e71729d6. 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/SEVQU2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc737a94d0c8092b46e69b2f9e86347ef19e0293cfb14fcc1ad3063fba7e0b5d. 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/SEVQU2001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4cffb3ba85e2b300c64ad441dee64f302802127950baf204ff7695b5e6af26. 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/QMDA72149719.