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 0xa6f672eac827636a48997aa6d68931e2abe591ad773ebae7ef017a248f460c91. 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/8b8e72ea-a9e5-4156-948c-ac989d54e65f.json and https://artists.proofprofile.net/proofs/artist/8b8e72ea-a9e5-4156-948c-ac989d54e65f.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 0xa05422eaf4c88216106a316a4a53e2a413833f7b01dff3c5a7d9da2ed8964595. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/RUA1H1763245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0536ebaf7c124857bd8b4cbd26d034121539365dca42e4113ba40b127cfd99. 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/RUA1H1763237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427b6671ccec68184797d7b82be295bf4d6149d46f5f4ffa58772d76553600f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR2X41989120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c782150a44eef982ac313766a451ac8d0c70e46e6265b49cd3ec7e86aa4ac9b. 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/FR59R1919462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224bb1f547193e7e8569f9a22a1fa61d7fac601c8958dd707d6beba0c60d761. 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/FR59R1919420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dac5a7b2d85d3af641e2b9bde38945aa6dd7c6009fcd1a962ca05f747afb8f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FRX201863588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102c46494bdbf8bd288d2d3b7e629ca94b1d3e222865dc73f641d635143300b5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR59R1919422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae3a7ecafae50bac7da2aa9fc0fec5ba58d312a4684f762af3ea52c3b52c92a. 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/FRS182091210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2829ccb0ea1a250554c850c24699411ac40a99a6c5c2a6ad536e2b7e9ecb618e. 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/FRX282168410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a0c6a3bd3933cda9cbe686db1e42276acbeff4b40366543efd0c76fa11721. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/DGA0H2326826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982a1dc381b533740c8788e2eee16cf6ee305b7a4e35cf1e1d230cd860ff01b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DGA0R2474718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0c7c4f58ffc083ef1d6bd0002f37f99dba0903be10bf5b045b65481d1025be. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0R2474719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a10e0f0f87f8c9d7842181e6d7ae8a00d0f04ee49ec440ecec9dd82fe5b33d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DGA0R2474732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ea7f44fd8ffab9e25656477199597ff52404c03201aa2e062581697e8c1681. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGV2502913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f55681f3ba235a06b203d4282cd840c97c26e5bfb9f973214ccad97300337d. 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/RUAGV2511302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245c03cdb270f77740b6db9f37dfaffa5a6ffec2877d2f4fe94c057c6903eedc. 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/RUAGV2513501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4882232964ae515d0e7b098caf9bbe83521dcc462b08e650fbb1cab28bc70f05. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/RUAH62411996.