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 0x07e86eb00074112d6d91793ca1f4474dca589d98bee8f13792a541cb3372a83d. 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/13937b6c-2811-41a9-a8a0-c8d6c056b997.json and https://artists.proofprofile.net/proofs/artist/13937b6c-2811-41a9-a8a0-c8d6c056b997.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 0xe233160551f4da5a5581d766b30dbc4a8cdac7694b84e9d1972806ed4d5e3a3f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCBL92300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e4b88a1d6ec28874642bc4ef825a7b8deccba47157f19b35b46edd8b6cb52e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXKT32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b53bd080192290e4d0be8c66490e3f6754f8f71d3569c84c68375e61f4fa2d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXKT32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f98bc38da5c11b1dc89a7decac35677ef6b769ec539cecbad34b6cde0c4dc5f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BXKT32400002.
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 0xb64a4f3e2c842d7e5e785d4b446fecba6d9244ef3cc6acd3e86839ec7988a3f8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXKT32400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ef41cec77a6ea36c3f1f78ff6f7432b2b53f262bf3093be78e45d37b6e80f3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BXKT32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b191a48f968339d5b6f82125c3088cbbec325f66f1e482ee6df8a9e00113ec8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BXKT32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89346652c5956419190485ce19e3070b6f7a964857355273f43a5b6f28cd64f1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BXKT32400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77830153fe808837635f0068c5fd06a97af9e7b0a174fc2ca30353722455996e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BXKT32400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09c35ae865a40ab8790084d14fc33d16bd2de826731fbe639777d524626f7e4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXKT32400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910895d67a71f00d77172aedd9c2472d11d6e938015ddcc3a0ee4f3a6b19bb9f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BXKT32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c82fd5ad9f134e9cedb0f13a042788e2468d97b54a761ca95f635ddcfa214a. 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/GX53U2067046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658ad39deac2201b97bba48c95eced8d6f58b05d7c85468f1a92afbd8aad3f4. 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/GX53U2067047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc27f171d2eeaaf0761e5868ed7a7a83b0a5d0f34c1bfa4cbf15b867d5d0696. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX53U2067049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43515e09aea3f8290cfec1a2fd6e864561d67bcbd0e957218be272a3f83a276f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GX53U2067041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8ff59e6e5ba932ae9d9aa5402ec3a2c72f79e0ec11658c956769d8d1f5860. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GX53U2067042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac03623304aa204ec8e9057edb1ba6bc5b32e0b72c042ec9dbb9cba52668528. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GX53U2067043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5273bfd21619c125dc0b84d3b979b9221bfba9f5b85f61a62213755f1be8c71. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GX53U2067044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c34f9ded03821e4ed62ed6c0251db5a3cab4caeaf772c93b4bd2450fd90fe95. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GX53U2067045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabff14f8a172068c06ab4d7284380d135d89c4c20ccfffde72d62d07c8d0fe12. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GX53U2067048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1c63a3ef25cf84b47ab3d7090cccb2240158bc60d4bd58fc5c6397639de11. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GX53U2067050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff16b556d5f09953e6d1b5faceabd38dc5c6c81fe6bb5023cc627869f7e701a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GX53U2067051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fcdd3abd4108d65e681b85264597f2b9f56aca663f978ce79b1deef3a49c68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKXN22263656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b55431926fdc9e308dd46d2bdae333f593aaed15961fa5110233edde0d12c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKXN22103352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed369fcefc563372ec6a1507afc4ad49b40c257c3ea7dc676c01406c8c715cfc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLM2094371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfae249c43dc07b2e5e6a55c78dd8666752776507954114b918bcf0a632068c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZGLM2094367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470b47d42fb75069d21297b03e4178cebbf598ab408bdfec3557ec5983529a59. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZGLM2094368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993aaf98958d33cf058536d318d5e4003df3d2bbe4d66a164862cd9e9a28e68. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZGLM2094370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f1ace4df2096e7f27d879be5344fd3f4473b0a5ada296862b8f09d4e3b00f8. 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/QZGLM2065336.