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 0xfedf9b673b1a3e033b560a30d55751bfe8b326cb5687c375693e3436df74357f. 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/a5475107-8d44-4ffa-ae90-a672fa5fc7c1.json and https://artists.proofprofile.net/proofs/artist/a5475107-8d44-4ffa-ae90-a672fa5fc7c1.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 0xba4300a5c6d40ae55bcb56e6dbd0c7dc08b2f8af8d014f2c520b56d229d0b07d. 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/GBWZN1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29925b41f7c9b9accf504dc91571f91d2d31fd6e93fd08fee9a51e52db3dfd67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBWZN1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fffd8ca4496829c6b5a2cc910776012f0e8b6b8e35ce7f5761ca5d56bf43be3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBWZN1900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a4712533a037de1302c5ca665abc7167b6301692b928a5185f1cc16d0738bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBWZN1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffe8209f9276e1a52c66d787e72d55020af59d13f60cfb3d7767154658c6a18. 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/GBEUE2000262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f37080e39f65676fc827becea645f4fd995644f35ddf51297553b3f0a673b85. 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/GBEUE2000263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036946fadcef1eba40a5e3935d80e42c965b7c94827be29edcef55b768b0cb77. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBEUE2000264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb370c84957b3ccf2d50e9a4b3023795fa652df45a2ffcf8e5a2788b76314c60d. 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/GBEUE2000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f4f116fdabf52600eb3771df01e9630a6229ece23fd887380a43161b9f8a88. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/GBEUE2000261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac44cce49b7752b717182206e4c413a9b3f6c3ede258e5bed0dbb5d03f944e1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GBEUE2000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505015d94d71f3912bec93f9a22fdd339cfddd0798fd8f100e9aac098f08237. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:03:29Z), 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/GBEUE2000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6ad00b9532873de54ff2cb4e4659a18c681f09ef588731f76282b4cfd7339c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:01Z), 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/GBEUE2000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160446766d679ca46234faaf80034c469766ed77f7511f93eaecca03ac976d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEUE2000301.