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 0xe88efd0bfe928a5425aeaa9d068c164e02a3def9d61dadbb8e37cbcf8bf09b3f. 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/0cd97fd4-f7ec-4506-91d8-1219fd7bb3a7.json and https://artists.proofprofile.net/proofs/artist/0cd97fd4-f7ec-4506-91d8-1219fd7bb3a7.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 0xa4afd11ac65c17ff1831d2945540a1957e6c0a53a035bbdec274d14ac1e24ba5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE62M2300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11f2369a57d43838cf230e0d00e657132b76684f7d06a83fc43288da76549e8. 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/QZTB62304930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf998cd02d73d73007566d69133f19539e6051eaa183af304e0f06bb17945d03. 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/USA2P2346875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f5c157e1855d52c0eb3b85d4d485b60aa3f93c4941d38c6087bb9c8014b08. 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/QZTAY2363651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa309c0a5f57b82669c1f2115637cd497fe97825c8c46d03e43fc2f86915918e4. 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/SE6QE2386483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc940c0001120974cd784f9be4353ca0511553948b5e7181e1c948586a9f1685. 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/SE6XW2398703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d998369b892b206d92155bff1a8f15b126eaff7e7f10a2dec4ec1880a7460cd. 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/SE6TI2376850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e2cff9380e21c05ba3dff142cc4400133bcb2401243f02f3b5fbe07ae97e6d. 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/SE6XW2350724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b26b90433c2495c678bbdb2ae52723f081b1a8ebf52659158195dcb5a86009. 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/SE6SA2381372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8a26125fb9506b2b58e90a63aa2b38cff4eac971acb4d81d465f74835b66c9. 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/SE6HN2320782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d4951ee0626ecd5170a4c67105ff9515d1d500eb304286154fc618ec69cfb. 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/SE5752358315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb094e0d516201fd8646f3ce4bce1122764c04e31b53fa70106d7163fc02ce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5752375204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30745ee8f571a12837788fa051552a8b716daad03f18b2be193f2d7066be1059. 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/SE5BU2395939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668b8ebdc46951ef67f7c079d8e5c65639ebd7b5d06727e971a1d11fb83ec93a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2368033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297eb0629c27a8b9e7e040f44abbfe01b1871e12e21f039df2c6ae651b736f6. 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/SE6SA2259698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1ab6c4b3cb826e857c055bb7a207f4e20394af996680ef0f5dc741f41b314b. 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/SE5XG2432233.