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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e835930699bccd3d406ab102db126496e37cf6ebf69d7bcbf0d09c6945db617. 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/8c2cb3d2-34e4-4034-8933-9b2cc5ae0c53.json and https://artists.proofprofile.net/proofs/artist/8c2cb3d2-34e4-4034-8933-9b2cc5ae0c53.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55aa0693d9195e411cffe1241c6e091907e206da657f5c01e1c1a4e7af3c4e7d. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZDA72295245.
Don't Mess With Me (While I'm Jellyfishing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5882a713edb571506e78c145636c878b49cab9a6ae89199ec1e88bf43ba3c0ae. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB22200714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc505069b9d91e32b538a1a480445d65f74cb2c147956ec7a9b54eb5acb4866. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZHNC2388072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fdb7ec0cfd3d472d43c5f9530d16881f80bc94e055848869c23370981fa607. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZWFG2308129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa22ce1cdfd22305424fad36e45ac7ee727d2a6fab4a297e2d6aae8707f6ae6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWQ2274699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3284f814cd6f5f462f708a545cfa0ab8b1cac533a733c8c0abf3be775db65dda. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFG2308130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d37f3691b41520fc4cd93a870dea07e2643018a141438ffd09c288119a70501. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZWFG2308131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa59cab134eb13962e4a5ea27982d458f7715d2d9dfca4c1fdca81bb6977555. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZDA62272197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934a1b55ccd85cfb056fdb386d9660778856fe2716c9521907f536f5353daf95. 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/QZNWU2278362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d300b65ebada374c76b8f6e2de60504083a3e4239f76a5dac1d8e8e9c2637. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZHN92235186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb734156a3891e3374f31aff6c6b8a44d2b706bb5fa01f063471d7a4e3cac1. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZNWU2236132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f084817081061cc3117525c7edf9392e7988edb14a55d61d278f8e7a1d5ee3f. 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/QZWFG2308132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb841bd2230f6fe9f743130a8bdabc84d4761d3e568124b8b42bd5e3448d23dc4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZES52420486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4371dbb95416e761cc1fd74c21247f4dce198420f61000544106f23208bd3067. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZK6M2491164.