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 0xbe5649a819cd1ee3e7376263a8b2944374cbe87bf34e4849be14d45dae701d73. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ecb02a7-8f2c-4a63-822a-d4a2dedaff1b.json and https://artists.proofprofile.net/proofs/artist/5ecb02a7-8f2c-4a63-822a-d4a2dedaff1b.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 0x8c313b1e5f1c70d901d08c527af9532598a73dee53ab43297a837f8328b2a057. 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/SE6VS2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c08aa331c23c68699e8dfd0f493559643738d46b2379e4f07e9e83e30afea6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:01Z), 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/SE6VS2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ffd0c27f19162b655f6bc9bcb46ce11fe09de56ba8907d80d7ece3815cbb85. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5XG2374202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b8102b59bad011c47b132cc0124f2d2e4184df3e3404bc147ce3c40c566ee9. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SE6VS2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc954da7651d1aca17f9993708086033580e1a9ecb74140857ce61a9be556ec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:08:41Z), 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/SE6VS2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b8102b59bad011c47b132cc0124f2d2e4184df3e3404bc147ce3c40c566ee9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SE6VS2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef93875c5d741c384f27f8f3de3f5ae9b798d9d2f350aad4e24f2c12e7f0689. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:14:55Z), 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/SE6VS2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49384aa4db3ad565e4a0425bde75aa6737db8dc04593d1f6d75a4c4bfea585c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6VS2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a94fe9d4e8b6c53614a55d2709ba6330b3e4f6e83b210c362e5b95fe256f1b. 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/SE6VS2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed8895c55c0e8df015bed0c61bbb8e51caf857a4ecbfad5a0191074f165cb9d. 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/QM6P42506659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e2de1047f5a4c6240979c31fc32ba917264a0c5554443e0d41ee0f1d2d8d3b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:33Z), 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/QM6P42506661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f84db401d47670914851d44d10328f3bc6d82da6aa69d764e5c510a3e6a0b7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6P42506662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f85411a9ce290207594d3f2a0f1021cdd51c84caa312cc9ff575ee33502eebc. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QM6P42506663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a038478e7cc35c89409796f9ecf220916ae48fec34be9ad2024bfed69ffad73. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42506674.