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 0x050a5500699122e27c87b2cf948b4518cb398947e1266b6865ff858253866f76. 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/011738e6-e8a3-4b72-8ae5-d552cd84b2eb.json and https://artists.proofprofile.net/proofs/artist/011738e6-e8a3-4b72-8ae5-d552cd84b2eb.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 0xe825da86213f553360bf06f908957a83d5cb95ccf2b734062c39e44fdf0268e8. 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/FRX762322172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089eefafba0f7904867dcdeec03ff7db223fb829ae79adfc37e17282600ab50e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR6V81151185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca774a504e8bf73c952efedfe63c83312cc41e0f0a8e289912d86fb5465bb2. 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/FRX282147599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16b1c156929552b1290850488d4206ac5071a020a7e72564ef1dc4d76d24157. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QMFMG2345066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9e77f75b3b9c9dd3f4f819bb79d460d7a7cf87bd219c64f3a91fe91b961672. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QMFMG2345068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997127d2130fcd254be63178ce9b7011c6b686b99d839d69f910aa46870d2e2f. 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/FR43D1803588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c25a73698f279afc4720073ea21e88af9e84dac78f3202a868f9456c653316. 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/FR43D1803589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7a07198d799f81bad4201dfeda11531dbbe2d3e4c442c6f3106402f8adf09b. 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/FRYAS0967020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28b2b195d27755efb2657a2fc5d07431d7fa24219ff01b80525f635cdaf04d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FRYAS0967022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91d564720c317b770ac4d28f2e11d6b1d7316091dae5c4a00bce233c4b8cc5d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRYAS0967023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9f630354d530ff760fe6891bf3b3762a468504e7570f8400ec23b0b8061223. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FRYAS0967024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9494da70fa13fc6da505856e93236256ed418fa7922a9b79f258c5d542b0832c. 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/FRYAS0967026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566bb609515cb751c62a0ed0886009fb92417b7805f52eb460d47c3d7019c75. 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/FRYAS0967027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207383f4735acda9357223ac30548d485a52d1378bb6e8231626161586342691. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FRYAS0967030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016187afe36267292129eb5a361161e92343179bf21bce642fcf466016891210. 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/FR43D2208293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe8b823bb4fadacee1274380eba1d05b3b1ae66fe1715abbd3da0959708469. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR43D2208294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a0f4fb5b4c8fa5cb9af5b806c15875d3055bff25732e485f350b333fb7ef6d. 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/FR6V80155165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c572ac70ad50b4a9e78b77c724ececdd58351c0fa4b04e8d5a2646672af2141. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR6V80155174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502b71e2d7b53a81ceb7c452a1cad931fc115fe9202c5099899d2129912cd2d6. 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/QMFME1457920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055cae2c82e8c1857789ba9cf4c6e186f2d3a7a5d22baf00386ab3130947245b. 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/FRX201777486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0420faa8438205ad399784a7a75f7d81b9adc196855205bd5fb9b24c60f58915. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR8GV2013770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc872be3e57ab4d9932ba9d17d421ba99d7aa55ba51a3f0e1515b3317bb83281a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FR43D1601718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece0624ca26cd7ed4296e7cf6e861879e3e88705ec8f229a6b4faae02f3b4dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR43D1707940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba166d54321bfceb3ea253bf3998ff90eef28be7c5ad263f517d9cd1ec7a6908. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA062575467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7292f1f00d432d90ae48d9289f810039619ffb51e0d80a5f1a80fd08d83afd9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR1S70800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df6532214e444d1e5db0ed0c1993faddd0e916fb9e5d071d652ac395eafe9d. 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/FR9W10808864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48f96406fcfe39bae77fa4dcb65ef031e05d8fc9fc0e40774c53028ecc0e090. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W11710000.