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 0x04f1b2b6633924bdf4f91176aa56526dbc6c18e363d4174886edf3bf91c8be22. 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/df3014ed-8ebd-4931-a35f-6e4600f2c608.json and https://artists.proofprofile.net/proofs/artist/df3014ed-8ebd-4931-a35f-6e4600f2c608.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 0x70779addcbd1c7567cd7a071d4ea0d0f6a53fe2a6ac5b81915b808d43d796fd4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNWQ2173124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b1edce6b58222e926e0dc7c55adb58d474399d2beea9284280e2bbffb475c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZES62393517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830d8e05443f95311d2b2c3e249dc47326eea1a870c605a4fc170d5ad3f7308. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZK6N2340988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afd8d4b26e463bcefbe5da805be87d1e93b1aac8ff5a3e58674e688c772eb2f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEN2310073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16910f89e536d0c205cc5c5e05d15599c6c1f7fb067d29376f37fdf556fdbf68. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZRP52314062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9725f7e91373110d55e93264e41f3d72edda9822e384c51b8fd14d20eeb51ee1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTBF2354643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c3e8385877cf8a5986f8239c9efdd76465d41a4d6c35ad989f03355a510ce7. 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/QZFYZ2430178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e63fa438f4215e6a7f50e9d7c0750de1dd6ef27edc3f0acd0a77fa10cbdcc. 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/QZHN92470226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85961ef69108a4c34845aa28f18d84536e65f0d43f0c65b8ee616b59c2f6577. 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/QZK6G2400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b6c179ae5922ddd9bbba38c28373deb0e212215aa49ae06aea3343f2996511. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2463477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48fbf2ba5837631f9f848694a4dfcce4b944cd82b9900980ebbe64fd5e3f19c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNWS2444481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da33b5f58eadbc656a0a4ce09569289e640194c5ce80af049be7f1d3a1578c4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWZ2428328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f648f715170a6d3c7d723787576344abce5e60661e501757a18bd00a514fd5. 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/QZTAW2492499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38df74e2fbb8e1d8c081d32e25dc0aff92eb86aa00825278fffedbb7d84c73. 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/QZTB32448747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61f18347fffe22ceaf90b3ecfb46967b414c1c069a33c4a3543442fdc18ea53. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBA2465314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b40e53ea93400f3247f5fad438b34e7e16ff862c02816a45f387706b455a20b. 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/QZWFJ2419509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d6f3fd037317b77007e0f32f9b6a313814b2e529e742c2067467fabfc70d8. 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/QZWFP2432376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecac110702af884e0fa0e981b3b06b3b7978f52390abdc210c915d64157822e. 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/QZZ782464714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff8e7112acf3f487f03a7897fd335e461644ddf042b64ce70195960bd646fa8. 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/QT3EX2425896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd270a3850f3c507a105ee5347b25355eaec36a2f83f94e2d4d0b522975a59a52. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFZ62531920.