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 0xe463f0ed7fbc44329b112fb2eb5510a6b2438380bdada900c317b08f40823390. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a37ade4-c72c-4c5f-b55e-215b5bb882c5.json and https://artists.proofprofile.net/proofs/artist/6a37ade4-c72c-4c5f-b55e-215b5bb882c5.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 0xdbe51b869782ff227df78b402113fc71b86029bf3e9654027c0a88af88ee57c5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/VNA092301479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f00f7f2be4e565b55a546d7aa8513419ce1ce45024b6984a765a5834823667. 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/VNA092302062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cedb263f3fe2c11b123e2c3f4e45da9cc8c7b202152169766c8dd93d436af04. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFL2303636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25c172ef7195b85c9bd41d3efb531bdc8f2d03a9ebd5b35b1b53d35ce575ca7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZES82473974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c2af99f50eeb7b222f3925b83cc53c875e77e6350de0130ee871ee60023da. 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/QZMEN2451239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008dc1f15fc0e34971d6bacafe9b8aac268fe7772992eb24bc14ead9a78d79a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEN2455374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629c361cd9726d5fc71e4a69aa7039a42ea0064da28c5fa45f87df3b576632ad. 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/QZMEN2457803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745396cdf3d82baa2c10ff851a343c28cf9e37758b52ffdb213f82bbc8a3ea21. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNWQ2490358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90171f0d79988b9a6a0a715eeeae2ad19e7c85e1c9e14c5c74a8d161627f38f8. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZZ7Q2490855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ddf3abe688f24014a39ac4c8ceab0d19f1ea9d8d960283977046936f2f90b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN42568190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a18b9b1a756a3a1b8662ff8dc949a4b9660d95d54d894d9a7403124354c7b8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN42568191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320dfc7a789bbc20984cd1a0b067dfc0fc9aa4b84fc8c4ec9503164aef8d6950. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN42568195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872ab39a65ad9c8051ce3dff00b64eebe8c72036b9e6052e0d76cbf6c66e42c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHN42568196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c3f54dd459c562f318cc7c9fa49b028b7e178fc08c37f972b807c1a6c6a0a5. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN42568197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4651992e3c846da9a619b93cf9a6cc30ae6bd98690bada23c47d150e908587. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZHN42568198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9388f6943f60da8a08b9877043fb2f4005a33b75db584bf3a107b57c9d57c4c6. 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/QZHN42568200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ccb0052c91bdfeda6c50a6350e3633b9855c483b430dbe37cb0970e8bc8f23. 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/QT6E52573251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649b25d7199c1772c52b17bfdcbf068236da570d2888994505361a66f5b90294. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT6ET2527926.