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 0x10f41882f8ed0b15acad86af71298664fd4781244de9fa6df9ceec098003c7fe. 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/19b1554a-a0ff-44c7-a6c9-a48b4d1482a6.json and https://artists.proofprofile.net/proofs/artist/19b1554a-a0ff-44c7-a6c9-a48b4d1482a6.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 0x28db1fce866189c4c0e03086ff83856aa7606bac65e300f60eef850607ff52f0. 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/QZES81892846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286944fda992c8c69355bf1f7bbea18de0a56eb15340491ec680b828d6e289d7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:18Z), 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/QZAMM1781489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a4b247867cd3801fc48f1e0efc96fb0e58d8b62206505782a9ec1fc5bb175f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZAMM1792612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c517ffe8ea26b157a3e20e35d5fba1b8da18f48cfa8949e591dae28e8babef. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:25Z), 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/QZSR42153460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0e90ebbc941d744c08c0ba47ba33e5d2dbbc913f33369558b6992ae43f139. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZAMM2291320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52487cd48e970186ba0d7bc2679fd0a79cd5e8dea5310c483e8fbcd09f0cb6a6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZAMM2293888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d49dc65146ec7737026aee80966ba0c1ba477ddd016cb122f3d82904004b4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:44Z), 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/QZAMM2293991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d49dc65146ec7737026aee80966ba0c1ba477ddd016cb122f3d82904004b4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZAMM2293991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae83b8fe69ff77d2f1f8af2aa2fe19bf6d5a0d7a9fd3869d888d2d7536d81f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:19:01Z), 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/QZSR42201660.