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 0xde9307809581a27df3575c5fbb096dde9109ba2007e5a6639fb423919ddc77a5. 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/615344bd-f66b-4e7b-b3f3-c98ffe80cf6d.json and https://artists.proofprofile.net/proofs/artist/615344bd-f66b-4e7b-b3f3-c98ffe80cf6d.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 0x89ed7072547fbbf04401cd2b908dcdb4e8ab46462de2bbbc90f27602581b1296. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZK6F2338538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e3326ca6818e202a1df9baeeb7188b57b40662e709c449579762a00182d01. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6F2338540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ff8ef723866505509a73bcf1e1b7657b022685be07d8b78bafdc8aa1d78648. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN72390758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba8cd8eef5963fe7003658b2930eddd52c441f51febc8682011bedeb570ea4. 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/DGA0M2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a4fb397c27a51657757d3b6cae87fd147d0dc24bb39af3bdc81310b8bbd76. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA0M2402952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba8cd8eef5963fe7003658b2930eddd52c441f51febc8682011bedeb570ea4. 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/DGA0M2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde87f28fbf46ec5ae12f14b4c06b2d3afa5dba9fd33bdcaec253c06b10f7b06. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTBA2346959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae17422a3dd3a3d40810012a9b1efe01dfbdfca5847a0010a044cd8262b578. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX452580421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6994f271c0459fa8dc5f4ea07a855d3766e620249a6262586c627d79b96b4e4. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:15Z), 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/FRX452598286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e154e23275189bafe3566cbfbd68a7d269c1e54c64778cc205e987b8e7a135. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX872524023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae17422a3dd3a3d40810012a9b1efe01dfbdfca5847a0010a044cd8262b578. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX452580421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676f659675ac91be7bef5a681054dbf14e2743de4c072271d88369a9e5ff3c60. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX872524024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b01b37298b9f472cfe75e9533d1fbfbee0d804648dfb067f90983af1be5526. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA0T2460044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc958923d45aeb1db98f5ec728943593100a04f1fb8b19ab658a453ed121c62. 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/HUMAG2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87c8aa30efe7e55a9d3d20cdad51a3dca0155baae9d5b70d03451e04d844811. 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/SE6XX2510746.