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 0x56795cd0f510c0142b8a76da34ffc795c0dcb240ea1368174952768baed99f5c. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/717e2703-c963-48be-9ab7-3837b080fce6.json and https://artists.proofprofile.net/proofs/artist/717e2703-c963-48be-9ab7-3837b080fce6.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 0x7015f5372f1dcfb59e91b5350d7306966e3b3cf3a680f700bc98e55fae656ff4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GX53U2448102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c347f21d89eb7990fcc7cd516f4f0b2d55e98765372b9214dffe26394fbb216. 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/GX53U2459304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28babd8ca5487b909a61e62dc898d422065525030bf786ada68cfe193af399a5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX53U2481782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3a7cd3ed2817512fbbee049a801d9dbc4a3fb74dfd41656ad9afc0b15aef84. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GXF9Q2404561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee1db6c89f4ad72a8af43867b6f3022cb141337aa7ad4e3ddce29cb027734d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GXF9Q2536002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0a8667a8b00a48267f8115414407604af531ab2d9fe69245d55e67f209426. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXF9Q2565024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7cd05593bbe5a64e45590439be12a45eab169d6eeb91400d672ad4a5a4c11c. 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/GXF9Q2574718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a59cfdc027aa3d1cf5f0152e7f1d0469e4a05bf00b82a0b2a1eee0a58da7e02. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GXF9Q2586215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5091684232600e1820b8d3e87d515063815c2c802bdbfc6bdecb8958fa4856b6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GXF9Q2597619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5027595b721628e004dce0a419b4b227bff4791df77eeb07678b9549c44a48. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBMA22584833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e1d1b0397f033595233709e195fe50714b3dbd3048452c078e9d3fc47beb4. 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/UKXN22514589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687b1c41967a34441bd31086f71b6ac6c83274c8373a60f45c202a873db4d129. 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/GBMA22573316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b14e1492510ee7ede5cc5897481cf0aa9a11497e34575311a122230a2c63b6. 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/UKXN22519858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da0ff5c3da17e4d6069bd3ee93a4c2a775e04201f54355efc5422281d76183. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/UKXN22520493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d3929827c363a31e0520c7c0e49536c33e2d2a296db6f6ab42b00e4c7cad1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22582946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f5c51cb3d793fb1e0d4bc6f78b730fb324fe66127b55a9c6c05df383d75108. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/UKXN22527291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d9d4468224af43672463cd38d1c2f0f44dd56b09994ad888500fdb7e08e9f3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBMA22573345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899843edecb91e6309786ddd1ec4089a15c48828104708e51a429bbb269745cd. 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/UKXN22532925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87376817b3c4b5f8252844d213a3a0cf328481192a73aeb7a5574328ebe6d18. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBMA22589692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5135864d88e539460a206286ff0a7da486fe0eb94bfbdd4358da1e85aab03615. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/UKXN22546592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8032002f6f3c8551d621745ca1a0f360e378270df9ec3f4c360f63c5daba66f5. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/UKXN22563956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e4dee0ef420cec86b58bb88ae65de2b15c330d6b8a15f11dd65804900a57c9. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GXHAF2581074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc621cc29ec90b6a128b4d6c5d5886c5631e537305e3e4fe9e6ef2752791945c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXHAF2584910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6716a7ff8b1e67de3b3c1a7ee842f88b1359b5368f0eab8d9c7cb161515fcd. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/GXHAF2589894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c37a399ba75a6618dffadc099a2c34204bcfb76be7f61a5f3b7f7a541b4c39. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/GXHG92544208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeecbe1e70c912c95e3280e9fcad84386d238146e0581940e3afcc9dc7171a61. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GXHG92572594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70092a2831bd9844441fa4cfa195bbf1980347d75f139a8d0782732d5f9cfad6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHG92575089.