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 0xa087612b983877eb1c416d9e0fc5bf5dcec9e1512fe1c707a3f3cf5159ddcf34. 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/a2d75d4a-5ff3-4b89-9a82-86751bd158b9.json and https://artists.proofprofile.net/proofs/artist/a2d75d4a-5ff3-4b89-9a82-86751bd158b9.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 0xae0b85189c70f15d0b5a2d36b112d6a3005b10d54426e6d8222196bed5c5190a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/HKG732328213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75fb5a9e586e29795cadfe1a98e2eec28939b0212b937f2c2924a9917ad86cd. 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/HKG731779436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804c2e40eb42f8b67f852961ecf581af2cbaf17b9ba34a637ae8b4148228f21b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HKG732203403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f89e636f7016cf328cdc9e9198dda63e2d0b75e39b8d0485ada5f9f7ac5324. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/HKG732313449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada737377a9eb10f9b519e18e1f6b653ed7a0be8e4d9dae73e68524eca91d89. 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/HKG732249559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22bba6ae60511a245dd214120c367c635cc84761418dbfe13c3e76705758ae. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/HKG732312850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04e661433fcc89b5d723068d675e02bda33114da5818384ac08119049363043. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732264806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ff1dbe320327f79fa154b3b88c17c23a69084b7d97216611608e95e089a3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732313259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9304e827ebaab9b8b3dc1e31459db40bc1bf7901f80d451a59d9a2ae2ff0c9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HKG732281908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c0a8beaec3b765de35bf76025d3c8cfd3e46ecdfa344eed95e82a825d2ff4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732319548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89ff41fa5c89b6ad26a3715095d3b331a0653b7ba8ac7788e1a98c4ff310f97. 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/HKG732457709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b3b1df3cf2b7afda4a1e0b7989318b76a449fa50a37943900d0aff772d569a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/HKG732530584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfffca22f28463e5bdc18f13db5d4f05307f4ddbcca4015961314af15a4e3a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732269047.