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 0xb9ec92c502b245790f78ebc6e03c280496ce48ad39094b6e443a4b84ef5f9c25. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/914c6de9-37dc-46be-a4eb-fb1e73aa2dc9.json and https://artists.proofprofile.net/proofs/artist/914c6de9-37dc-46be-a4eb-fb1e73aa2dc9.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 0x22fe05d8e894f089542876da62cc31dc320dfa2a8108281cc3410ece16722998. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA82295474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5268fc22c5eb2b6427c92ba95b9e04971278505c287b5657a0a67c1ec54c3d8. 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/QZES82350987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe225bce14c2a27ee3f88745472df1235bf769719cb66ea4d6606c4eefc7ba70a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZRP42256455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90752ed564439dc3ee72fb4844d561dede0209615b1ed1def65ea58613f39f6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN62423010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9640f12db011315f4a4f3b00db73840bf73a17d7c409015f7908cf657538067d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN42329282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8966f2aa20e4a2e54dd7397e8298840a390d356e767f6f535ab13690bac27243. 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/QZHN42331041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d8b746dd7bb60fdb9211ffff82d5054866ebf117569ebf1a77794fc574d75d. 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/QZWFK2370256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba72c7087a18365efa7a8472230a7a69c5aae21dec3fa35d2779ce4d8785666. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2394551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb09b043865e398e0b820bf32a6571f53c3b986c488a8de9bd46d3c7af2fab2. 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/GBMA22419123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734bb818be08528eb0eaadf8d6218cceacb46543b68c6c53efeac52d7d154d68. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXF9Q2551996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba97f5fa52c0d200004985446a61a18eee0c66e6954909cb1d6fe17b7e92786. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/GXF9Q2551997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e7b2853b09cc946fdea82262c0ef8f9340fe51629a20f5fa44d650151d752f. 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/GXF9Q2551998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f24d3facf9730ba716c83259fa41c803e92343703b5fca9ca30f636a21b037. 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/QZTAU2357517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9aa63678dbd544435737593a92f6a456307a3eaff8038c5ae8abef636617ba. 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/QZMEQ2386911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9eb823f279fe34aebdcde20e10b67435d11e224fbd0130baeb424c022863ed. 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/GXF9Q2551999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910fe38b2ac04af1bcf3e1c0df9aefc9a1901ed04ad248aeb45aab08bebaa6aa. 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/GXF9Q2552000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc7ebb91ef5086dc5b28ea0cd6fb250f6c2e37903b4a38202d5beae58d75a4c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXF9Q2552001.