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 0xdd94a2d7ee9fe06aadb5aadbd9e26d924090786d63d002c379bad260db3229a6. 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/f80728c4-0c70-4456-85a5-316ad282e21b.json and https://artists.proofprofile.net/proofs/artist/f80728c4-0c70-4456-85a5-316ad282e21b.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 0x5aeff97edbba40930c4d5d960ca5084e05628b15d763d2d8c45f0a9c3b6169cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42107769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeff97edbba40930c4d5d960ca5084e05628b15d763d2d8c45f0a9c3b6169cd. 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/USDY42107769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d46028afc2902065fcb4d28c84b48d2141020b678b218ed5cde7a6c5524e4d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX3Q92097274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02752a6aaa9458c0a7b6f36e2afa016a72ebfcc98b0b9c6142960ff6c19d1a40. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX3Q92097275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d46028afc2902065fcb4d28c84b48d2141020b678b218ed5cde7a6c5524e4d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GX3Q92097274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02752a6aaa9458c0a7b6f36e2afa016a72ebfcc98b0b9c6142960ff6c19d1a40. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX3Q92097275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97aeda9463e10404a43d41f23855549771e5b11026f7959f23a5b61a62390dc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92278133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c10c5b016a786482045038250bb43fe91a69c241dd2c7937d1c31ce18a2d9a6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BK4DA2410909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944456082bbdd964fcc39a5dcde2e91f3e39efbbfee5a047dbd59a676ba77911. 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/BK4DA2413778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe73bcd3e20462008719089b8a007f1ab066ba060e289d559bff133d13fabc39. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:41Z), 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/BK4DA2462940.