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 0x10df62606b98dd0919935abe7badd5df87d6902b5b5d4d57d3c3d1ca9ca4e6de. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f2beaa-0551-4809-b4ba-caaf2b24d8d6.json and https://artists.proofprofile.net/proofs/artist/b7f2beaa-0551-4809-b4ba-caaf2b24d8d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x382f1a2ed053640b24e4c51ac78c847efa91dde784c24c06bdfe7d07e96d9901. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb7645595e3b8bc6201e85ca6af159e0bf1625397b7c3e7bb1eada5af68dac. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEUM71901406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774cd4ce6acaba0c27922eb04a9dbeeae03bbfe89811e6dce44f776fdd6960f6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEUM71901407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82032a4b5618456549b1c085b7335f09fd205b7ddf8b09ca387ca61d94a8d80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1be95d6bfb0463cb5679ebfe35b445b3347a432865b4729d08e1907a7e9344. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb7117e2831886c771028934c3df64b6cea26fb1013e9282377c4bda357c0b3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEUM71901410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf794e5bc6da249b8c050fed59523307af61fbff9c370b1489b3e229e7d4f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0633c9b9ec29f81f996be4f7ab63cc8abe815777be3b948c6330585860fff6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEUM71901412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d140ed8dbc2ede1ac4a4b78546c3f068d81b5df1fed7a90c9859ce85a214e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEUM71901413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c626cb682908f534f4901d840bf2cff419bb8a35721a2598e48b1b71b9aa16. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEUM71901414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1b3d9cbb585a630052a67c6dc1ea18f47fcf8d1414c01d02d6860e5b98d76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1c38b865d2bc799a48476d18cab4a5f0895395c0946c765105752eff907b56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a70419d539c42306664266760bce342fec6361ae6b09fcdb79bcfe91f8e318. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71901417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fffa35bc9ddaf0b8a011d5d15831b228ae5116282e78b21df7124f473bdc6c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEUM71901418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73819aab4829243d9968ed16960b7604bc6b42ea29d3b8d4184113e9a1082ec2. 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/DEUM71901420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ced4a34a3dcc3080a0fbd374712be175aeaf1d92a4bf5a831a82f2aaaf257a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEUM71901421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ba3b722d26ddab86aaea4cfe04b1d94f6457c8a9467f85e39a5eb2b387f255. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEUM71901422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807091a00e3962b65dfd4525d02f5167d4492c41683adeb5456b228cfdf00ee5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEUM71901435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a207ae520cd716d7c67750d176678723a99ef524cdf3706aa050fe8f1a7c65b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEUM71901436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecd16124a1a2c7283f0f07234cc19a8861685a2d1f42e9565279922e22742ed. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEUM71901437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f669d2757e70ad556ea94a37e011275156f33540813ef5057dbd273de18dfb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEUM71901438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d5371eda52dfa4b2082042dd5469ec4a141eb5672f10866f41fa029a77b7ec. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEUM71901439.