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 0xf4a553d90b571d29606b54b1f20498e0e3c3a3e7cdb1ccfde60da34b9cea7462. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5850a07-22cb-429a-868f-21e5bb0d0862.json and https://artists.proofprofile.net/proofs/artist/a5850a07-22cb-429a-868f-21e5bb0d0862.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 0x56fa452b144b8690ad045ae2139c88c648cbb17e7eb30c96cff15afc1ac047a7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMDA61326664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6b31b794acb36f0348732356a3f08c4848000ae8c15c79908f1c6ca6d69a8f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:02Z), 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/QMDA61326669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe836a07d651f8901c4fedc9bcb1c89e753d6009f22970a5568c1b33a8b3879d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA61326671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e2a227e0be8df63b9e5091fa5536aee5e1a87dec8ed53c087f996dc3af98e. 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/QMDA61326673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449b17b2eb141b22e622a09e921057c2893bb8512ce182b23f73f608730a69d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM9AA1578837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d27c895007f4eed0a3830514b7102a538d9d3f015c3968cb52e011754c93b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:29Z), 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/QM9AA1534610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb524811077eccf701dddd5267d8b3d01d015a5cd3c3742c7499c0942dda8b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM9AA1534611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e2cb9fc751473cfcfa44d93fc0fd8810079abfea7ff0f1c0fb658fe3b93029. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ93L2032439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb58bd5f6b37f8ea23c425470090457f5aba9a49cfc7edd51b4b2c0db7e37923. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZ93L2032440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e9f93a86d3a81d4dea99421355f57d89b4e5588058ffed23623aee3f43014e. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZ93L2032441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351e3693f36345f256015a5b44d48e933ebf4c202c0a827fd4da5803f2e2613. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:17Z), 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/QZDMQ1900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb146083bb9fc61d48de2c2c55fc08f0df418b91f70bdb647592ea65e86af8498. 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/QZ93L2032443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08742c31c8110779ce045079272748033ddec2d98ad3b30bcb4fcbe906697cfe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ93L2032446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168fa29359805a3152051668bdf48e3dc25e21a6218ea43fddeb44c97f91998a. 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/QZ93L2032449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd348226c81e9b139c7f0af68d2996333562de4d44fab71c993c8fb842034c4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:09:55Z), 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/QZ93L2029186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2384b42aefb2e3ee147549ca15fddbf39c74a3ed410a793cb569eea432ef90. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:48Z), 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/FRIDO2011980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44770c917d05885d848e0c38ff15d5162879b2dd176ceda4b58ddf453c26c37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDMQ1810203.