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 0x591d4f570de2ec5c61ab9e7ec8b07f0d371a084b0572a81c2068a64c56353810. 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/9ad05dc9-c2ef-4bd9-86cd-157ed57890be.json and https://artists.proofprofile.net/proofs/artist/9ad05dc9-c2ef-4bd9-86cd-157ed57890be.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 0x71c792d62011c74f8d174f4b1ae36cac25bd6535ccc9dfdb78b3d1358cf756aa. 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/COUM71700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e296de07db98a2809b2356bea40e27bda1abd41ce15068cf3ae7d68ac161156. 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/COUM71700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bf1c9d81da9dfec3c21fc9c133bed39c984823e63620f9c848860d36c02fc6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/COUM71700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d708ecd2daad096d0ef49d416569080539e55ea6a56faee75dc0df0694c08. 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/COUM71700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dc49338d16949e9c031b0877b27b766f47929d64c70fb0a3f3a83ed9412315. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/COUM71900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a2b4c0b9f32804fc3fc3ef917bb33343067cf5449c5b27efea65d8001305a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/COUM71900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55dc3d59502ff3cdbbd377e237d8933b88bcbd3f815c27da3d89126c3292a67. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:55:02Z), 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/COUM71900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7204c19e9639aa09840ebb7cca3b2b66ecb95ca31b6aedd649d62d43d0f451. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/COUM71900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e348e68d442872ce72c1c1adf10ae08cc8327368c4bbca91f8b1c925244b49b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/COH010700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c14a7905f8aaec139b57f3d4f88d4c69f7191e5376d45e678a24cfd3552cb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/COH010700144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d206865e9e1f3b58113a78cb08def4b014051df1cec30ae2dd5c230e528f60c. 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/COH010700145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b38524e0307112af095d3ed2ee6caabc8fb26d71f0dfa9b6fdc8b81a4939efb. 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/COH010700152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038677a0a437ef4aa1f4c28677d20dafc14720381819662241accc249a876351. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:11Z), 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/COH010700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a940d46389df74e5a44843aa0cdf1dc2d18c4be21cc0984d2a42e6ffbbf7d5. 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/COUM71900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f144af2973922faafa9eea2dd2dfbd0664a081320459ef9616b00a50c5b1fd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ES71G1515532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439556511733bbd92def094539db5d3feba25f3ca0b338e11b69f83c1472e46. 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/ES71G1510785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2732cba96825ffa9cb62d8c41c475f04fbf4c19b647b57bc4813c731dd6704ca. 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/ES71G1515535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3b018ae0efd661f5f87fd6b891082e8d168836b3c77e3430a61f31bebd8b17. 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/ES71G1515537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b680709b7edefd35e9bdc3a35ead175d57fc596560802f37a69721d42d8d4. 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/ES71G1515539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9544a686dcfd2dffa55713a352016a5f078c604a03c68f1803898fd96e650a68. 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/ES71G1515534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410fa6f717db7676a284297f7be60ffd5710e3f1d0ced874b721d6806d9915ee. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:10:05Z), 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/US7VG1979865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ff88bcc1a0ae4dcaf5cf436ddcdd4e3f247b30aa05ba2a59c2a8ebba0a6abc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:32Z), 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/GX3Q92464936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f33e4b875947e32a1eaa75413db29d6c70ebed0fb41d8da57378069fa62029. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:32:32Z), 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/GX3Q92464956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e78b432b8f069ad88db0190a66503fb9999a89c03c8b47ca8d5401179d1571. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX53U2351936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d39a1c9cc11c5c3ca9cafddd0f8616a2e315cd26fa3d419ce5b200131f44b6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCADQ1896643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e296de07db98a2809b2356bea40e27bda1abd41ce15068cf3ae7d68ac161156. 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/COUM71700018.