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 0x22da144a01265264b9df62fb8189eb699d3770dddf932cc942b92735b0a4f200. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8d1b2bd-087f-439f-a6f3-ce954edb7bb8.json and https://artists.proofprofile.net/proofs/artist/c8d1b2bd-087f-439f-a6f3-ce954edb7bb8.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 0xad15fecbe162e288b8e6992c0e06d93d82929fbffc9fd9755856a19feeb33158. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:51:24Z), 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/QZFZ71984232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c6128137236b4f627032a2b89af145b102bb9e1864a480be03f3395e0cd40. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZHN61992508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe933d705e81bd60167d2387f32971083a0902a42edaafe8be9fdc5f6eea423. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN61992510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e79fc5cee0b7534debac656c9e225220081f761d7eec3fbbeb9ca76331517d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN61992513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5f4d306a72ad8e19b2f3891dc08ff7a7d2be067b81ccc1d8eae64ced01cea0. 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/QZHN61992514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50639c2e6a7cb9f72bf347aa901c9fd50d1e348c071edc52b07b626027f4bbf2. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN61992516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99892df346a2e201b3f02b516e503139008ccaa2d07a583e17db971762e85a8f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN61992519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a4056eb746c0fc3a754abf076257b23ac3e773b9ab082a37a563765dd6f8c1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:31:12Z), 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/QZK6J2023368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa34ff4449b72bb6d48d18cd85c3e6f363d4d44fe8c466e3e6f0f5235b8bc475. 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/QZES62217241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c91e3b930d13073750cd21b359ecb4ebe5fc415899d232771b056b7dffbb58. 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/CH7812225362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a7862285d8275f5057d1d437fb0beda419f3f4953bb599d8d79f45bf5aea6. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/CH7812239079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b81ae8de096227393d252e8aba8b4b7efd70cae592bdab6782abc1af479ed12. 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/CH7812367509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5107d123ed767e8f370d5f867201ae3b64417c41879b306424b19fc378683ed2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CH7812408926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5761ecd633f4130a4c9be545473c86f4b8d3b6367d11f778018903789e6be5ce. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CH7812409814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884a2c6d69ba6b4cdd6489acfa3db7939ec2f21067362fbb44318386c7ccbb6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH7812410622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a7862285d8275f5057d1d437fb0beda419f3f4953bb599d8d79f45bf5aea6. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/CH7812239079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e0eb48f3f41b3512cdb667a437085ec9e46918757f8f5394a615fa42be9fab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH7812410700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0056dcdbb130f1736b0cbca89128ca9e7aac67c96087c3caa1b15fb98ea7d. 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/DEUM72308903.