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 0xf1dfeb1749d8086dc150c7a02a12b0d18b4c214ed581431e28efef2b19c69295. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43ff2e43-21a8-49ea-bb10-4c4acf2bac54.json and https://artists.proofprofile.net/proofs/artist/43ff2e43-21a8-49ea-bb10-4c4acf2bac54.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 0x872ab207fceff4af1b2017957b48f98339e2260e0c9cc8a686b4bf0cbf5db542. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CH6541988105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3337781b27c98c77fe6f6df5d38b9309da8dad573a01b6c2c41c5a9f2088e57. 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/CH6541988126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c297fe2ab73f5be2f9d1472556f73692df27eec7231b4627e58490b87c58364. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:03Z), 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/CH6541998988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ce8037eba628f3eb9ddac3388c6dd14295fde966f09ae19c829518a215f802. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:34Z), 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/CH6541998994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b28bc6abe7476d1e2d3b3a33a7a096611cb57f50c9dc44a3e0f0e6c69d37e. 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/CH6541998995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4085f88c14c792868bb4a9980f56456ab54c62cc91a1f3a4c9989c557894659. 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/CH6541970660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d20a37d6436bf5995d418b4df1a4005521f8aded84af1726522144ce82429b. 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/CH6541970661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dc7a9b930ab0b47de4657bc7eed76f39d4228a66bdaaa39a81da7dc4338790. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6542012676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36ce5970a6c90fa4f8f85511ffa0d6e179fb74e44f571854802bd3313430e9d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CH6542253112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61dfe6c71b792b06ff9e589faf1fba1390156939809b544aba4c8db0ac953a. 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/CH6542334066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026cdea63da7b170bb5d0f3bcf023f0dab4dcafb4a4d8b2e49e6ceb73cf88b5c. 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/CH6542334068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a595fbed6ccd504da4786f1c91f7c0a9058cbee94cb341469004131e2db4a5a. 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/CH6542334070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d766eb82c41a439c30d25fe80524a38d682d47e933ba10944d92568c1660048. 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/CH6542372514.