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 0xd16580d136fd8c388fe70befe7cb0b778a60a0d6be09a0ced486ae3194d44feb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35a6956d-7f97-4315-9b86-cd63b4e73728.json and https://artists.proofprofile.net/proofs/artist/35a6956d-7f97-4315-9b86-cd63b4e73728.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 0x6ca65848f03711de73595c571d8051c94e4936b3b7521d7dbfc35b83ed0cd0f6. 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/RSA221601089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4e75a55f6623480c6de7e491a174e23ba226bdeeac44d58927f38985feab4d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ATAJ12100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4821540fdd1d714dd23029307bd73c56b3276d5b7e283b8c72245e12c750683. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ATAJ12100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1979e2c5a315d67398e0e55d2f52b60e19b239558e4edc9035ba486b66799ade. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:22:16Z), 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/ATAJ12100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028709f947bb2ce7a068095130a39223b8457d0f993d2eb4b36689c99cf8a54b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:59:29Z), 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/ATAJ12100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd0c1ae18585b6bd4c840f8429854821d5f4543410a1f72a560c47d1cd91d24. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ATAJ12100426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e7f32b9daf442225db94f5146067924ff6cb65b5d1e0e92649a40d0dadf8b7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:04Z), 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/ATAJ12200448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f16e6cfe070d12546e1ea16c1ebe86b543f91a02360b4463220a10d045efcf. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ATAJ12300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12a0d646b10432e55e7b22c36ed12fdaebcb2bde0325a08964d70f33c02c63b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:28:07Z), 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/ATAJ12300434.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b8ff379ca24a18b0cfae4a48aadca31541b46f53981748083727e13e31372c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/RSA222306576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332fdc9c218de679dba28f66a986c55e72bc6eff80f10f70ef0a8fdee9de351b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:05:08Z), 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/ATAJ12301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81babfa49e378168fe0bff2e37a1a2855357f68c860e33b4b0b4b03bcbc5ec02. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:47:17Z), 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/ATAJ12301654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd508b9700dd69fc509dbd26e509d293b14165e7cdde8a83b5fcf688cb6dfd123. 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/FRX872587300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297efd1ccf7c103e80f45c586531d8ea92f33a19a40376e6a1ba6a07127b94b6. 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/ATAJ12503100.