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 0xa7df2837b4d5de434e5731a4891ec651f5a885f09d39a76472eafb1427b7ef6a. 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/95121868-8846-4bd0-9ecf-6ed96d08f2a8.json and https://artists.proofprofile.net/proofs/artist/95121868-8846-4bd0-9ecf-6ed96d08f2a8.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 0x3a83b786673239dc9abf712677fba8c1b487ad2348fc4fbf51a116985542b877. 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/GBRKQ2319546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7fd4dd22f94f062c96835e38dc2b8e5588aefce3d0e5322bdcf9a2040ecd9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GBRKQ2319768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad60e73e10350abcef65e97fc5de4347e62a062bc5e5c35c3092784387e318. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBRKQ2319832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe0e34eba24460b41bc4899c3b25765fda2d30164256b106cb0b1b6f669500. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GBRKQ2321876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171780a05c53eeb4f64c4b8c3d5442984d3d20d9328a1999ff7a4c0e5e465459. 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/QZTRX2317297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b659a9eed6cd64f5f1a69dde184153ce0fa38f6c72d2c3649d2a768a9634a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTRX2317332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ff17788b715e5d776fcd6d88f32a28c11bd5e25e0d6e9d914db0a96ba9dac1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWY2345904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a0732643a07e222d5376393fbf5e8827bc830f16c2e6b48c97638fe03b33a7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:44Z), 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/QZDA72484471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5213fb0a6b5b4619a6d190c87a801af2700b50726277c59df5ea76fa239da6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMEM2414188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b5f970c1616bf4be684a3385a49697c54af5a41180227126c58b541b0fcc75. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ7T2413909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8d8ef2308cfbdfe5edda7f14cd4bc07297ec1b5ba4c29776e4fc0ad3c53b8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN32537135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf22cf0e6d7b1928ac2df49c2b06ac19f5abc07f96d978f5e7cc42be7aae828. 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/QZHN32544239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee5a87abf7861a3ede04cde0afc7a1bcc5d8208cbf30b2d47ecfdf9a90992e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6G2569559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cef328c918c5305e7d5e9ddf176accac3b1469125c6ae7db0d75f797ab0f69. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZHN32541401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567fb2d6fc7ad290cf4b8dd6f25a30ba45f23d4058918e7abf475ca8fbd5fce. 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/QZTAW2581226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6cf3ed436d6f744774eff24dee18f0c474a4f4fc7c365567b252509a5f76b3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZZ7N2522901.