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 0x99b6d34c32253c65cdd9c2ec4f254f8c7c264d146e40f05fe21316bd95d21429. 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/f0084bd3-7496-4190-9e00-674974f21a80.json and https://artists.proofprofile.net/proofs/artist/f0084bd3-7496-4190-9e00-674974f21a80.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 0x998f1f3cd981e7d6ad9dbeaa5efea26e815044a56382a052848d37364811c3b7. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:02:35Z), 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/CAHQJ2567831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1dc3e7c905bc86c42cb32feef023e39541b9390a6e190452e4d4005ea0205c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:28:53Z), 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/CAHQJ2567832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7315000501467a527c466a283a1a11e37205d2b4aa3ec3348e5a8528ddfc1c69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2342939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc17164cb7a2683c24918be07269b60d4bda949d7b97e82ddc6c78c149cb18e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ8A2424824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf36b65d43a5507746745005315a8e966ae62405c2ea7c77ecccbd3ac23dbd3. 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/QZZ8A2425519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f07806ec3b68586925b7e67e187a3006aeb6bab6b12e99bc35028c0d10083e3. 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/QZZ8A2425674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8414581fa1f5dbe41994cbfafb3252c0afa330d9e4f020c2f705541eaf69ac7a. 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/QZZ8A2425796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b95871b3046d2c62e382888020e6694985f4b6523a4a3deb58d52d292c72ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ8A2427472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6879775d1a943a1dc0c40975fde39c19be16c4af95b30d25c17ac4d5bddc8ca0. 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/QZWV32419690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa2cee0183e76c5b1cca1747a9c24f84f6cd6831250fcc3fa2f31e84e621d12. 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/BRUM72402291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa2cee0183e76c5b1cca1747a9c24f84f6cd6831250fcc3fa2f31e84e621d12. 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/BRUM72402291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ef6266ace8d7ec10d353e950854a3e82c5d840b397b3c8b8dca8299c47a084. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK1YJ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0a41e1e5793e90217a7c3ef768860c067cd496291f495cfe0f34d6211eb290. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK1YJ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11ea541e734613001c04c5cfd4b855e9f0da40b55a0825649f64b757a6cd37d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK1YJ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95161bfe0e2eed09cf196db113cf39074810a01328c7886fc53dff42629d573a. 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/BK1YJ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df2d87194ba0ae856f30f188227f64aca4f883d9c027aad2ad2de03ae9444b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK1YJ2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3111e85f44695595d311686116911b01736eeb0ddd45e62789e50c51dcbee3fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK1YJ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab2a7d03cc54e234c497b8b24d3123be463c442eca83f91c02705850e6ea905. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK1YJ2500007.