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 0xe31219b6d244b84ad220d676bf4d64679075197f20d973617fc93c1e7e246201. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/152d7660-7198-434a-9666-38fbbb85c25e.json and https://artists.proofprofile.net/proofs/artist/152d7660-7198-434a-9666-38fbbb85c25e.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 0x8f0a76b053992fbf4b1a2b5d997a4fc3bf86ae6a0297385dc804562917c9e024. 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/GX3Q92443840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8870f4f3b0ceb248e9122084c8b8646b47bb40052b716ddcc8e6c0365f9fbfb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX3Q92443841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7365757a5106c1ea28ba25858127317eeeadf68a26fc0a4d34089329cedb23. 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/GX3Q92443842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc27f7d5c75405f935e31fff092025c26a799f6f536df84b61113c9167495b9e. 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/GX3Q92443843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437e7b92f3649ac7903b6e55b8187b966547f54616c2572ff54048e354c6b52. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX3Q92443844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd866b1694a546f7f642e2b01d79af6f12373d228782f2b7ba9d6f6a777ff9e5d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GX3Q92443845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5698979f4087fb85efc0010a91c7c122e32c1bff67aac53092a39c34bfc4d2b9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GX3Q92443846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210e4c369a7b6387fd41cc8f351b26ba7737d05fd263dd054cdba7dfacc7a7f8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX3Q92443847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf6cac379bb232b193a0a04b8203b1840713aa166376892a98d3911827afd33. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UKXN22413126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddff7bfdd3c7c05dddffc6d957636f7693fee78ab9869431482e11a0311276d6. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/UKXN22413127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f8580ee81d04289e300621a95ce042e7e8884fae3297e4625f63bed0f17f95. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/UKXN22413128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd382397622cb164387b5ac66354eaaf170632565b0db56313d4315e6f1af4577. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/UKXN22413129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219964a1fbaafd1c8d1b33c6b65591ac8725cc155e1a2f520a9788a884474c01. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/UKXN22413130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed44e38924c9979f3a982b508c40fa1b70170025003a63dd47918d5ab1f7a544. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/UKXN22413131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b5e4cae115a301a8ace03988c9239a46124b408338682eb0fa6c10d87f44e. 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/UKXN22413132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12002705320555975e7c7217422a23687837180cf85330940b5e16665467780. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/UKXN22413133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeeb64a80c799e6b4c99c777c1771c65e5abec2d25d73e42440f8e1ee496591. 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/GBMA22441445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8dd8d5095a299a07801f69525e6e6ff1bb677e1e75505fb64fb9052d672916. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBMA22441446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c1b41fd3f03006a9db7a22e470f8cd2c9cf425444957c21674624a0618689. 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/GBMA22441447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41c5df37001cbadb082896eb86173f4b503df5169bddbeb5c11ba1c769f9f39. 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/GBMA22441448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95783b11f53e00626a2643f4f0e8492df5f39eb7260d5a7d27f6304b523f336. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBMA22441449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dfc67bc20c4c64947080e3765b44bccdf937e6ab21a5350e07dff5dcafd582. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GBMA22441450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031b47799129adc6cd02659c4cde95827d46b0d8aece4f6edb243df5990309f0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBMA22441451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23dd7a4860a174202de2756c7f9ee952ff574b45253e52973bfa5f9756dd73c. 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/GBMA22441452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3895a6806c7a49f6e6962b2eb2f9a1bdec957210994ac1cc1f798d3413cbd6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GX53U2329997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840c4a5d94a8d9d91f39767e5f8ab6090f8c2e333e6940dde90a9d6000fa3b43. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GX53U2329998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4d3c9f570167414fabb598da1fddaa934a46a4289eda38807a362b2ba1c965. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GX53U2329999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ef7dabd9c01735e73346631bf0be286f2021a0652efb228857212d57273151. 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/GX53U2330000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42163bbdaaf2c5ee17178b465ec1f8e6cfab970e97ca0a77105b87d891f6a7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9885c27aaafc34c0ed1e606ffc44cb9be1373867812799eda550fc5ad92478. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX53U2330002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167ae1ba06aaefaf57deaa59ee5f01a06370c0aeea517411053fba7212267934. 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/GX53U2330003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17420baa06dad3d707052ea3e91d6058c3397352390d051497da58d8e7848ba0. 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/GX53U2330004.