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 0x67290956a991866c67cdab43006725c805f3ea95d893cf3f858146352adc1d49. 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/f613670d-2fc3-42d8-9746-5dc15006c581.json and https://artists.proofprofile.net/proofs/artist/f613670d-2fc3-42d8-9746-5dc15006c581.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 0x5478887ea7fb2ea1581151dc3afd6adb186f612d034943dc45d27284c0ff3123. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZA162053773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a62c9832b3c40b4f70c3a2aee732b9f9e4b80996a1f7680fbb2f75d9238b00. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:05:00Z), 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/CZA163381819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fa31073773a638fd5410b722702a55dad70d88b3dced774bca68b2be94ebad. 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/CZA162053776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe377eca94b801d0e9e9111f7d74f8f73b0f89167fb1b6c3e1b15367d43991d96. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA162053780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2238b81698556bd20b995ee4c2a1eab98000f1daf10808a580dab1ad5fa639. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:30:48Z), 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/CZA163381793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a58272b6fff8556ea4831dac18ebf97f68232ef9af8921cca931c2aa6ff698f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:13Z), 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/CZA161750402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49834b5f071d6505311fdaef2586e2d13f74e395188de2020a1b2c32b5e66188. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA161750403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb273b6ae7662ff61727c3cb137174f6086a2cbe44166a1d1dfb06a3ad0b98aed. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:51:02Z), 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/CZA161750410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdbb95781c3ea8741914bd200aff855ada1c38582b9e4c54a1a28a6a4afbc42. 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/CZA163341729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12327c0c0e281afb02940e947329148e21ac4498cdd54e00478fadd72043a46. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZA163341730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08edc43d4b3650adf2381360f3b499eba7a3143bc5f7b83059b5764432fbe10. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CZA163341734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c24805adff4de44859018cf5294ad2ae74acaccd87433f630a409b4b64cf4d7. 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/CZCG72300047.