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 0x04ed8ad8b9dce3e7fad1fb03222bb3ac3a100a06337621212b0c41bb567050e3. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fba6b4c-7a66-4b0b-b428-6124c50617f5.json and https://artists.proofprofile.net/proofs/artist/4fba6b4c-7a66-4b0b-b428-6124c50617f5.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 0x613a3d8e9bbcc9ef5211249e5dfe74f17fd71217ca754049b5daf66d10e0a75e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEAR41993307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf8b93a9a8d1408dee6c7095ee87ddc13d35c2c0e6d9c07e9569fac30366d8d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEAR41994445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d445d29ca252dbb8c85bbba07b80c138f492e0e65bd25f45ee3413b1d5388f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:31:36Z), 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/DEAR41991948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c0de95f25185d308537455d745adbf8e15b6cc3c7f8e80eaaf3595b42565f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:08Z), 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/DEAR41932762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b431c640dcb1f403e599a3eb9e62be6937ca34657de30ec7fb4b6e9ac2eb07b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:44:14Z), 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/DEAR41923774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81ba37ed956bcb9fb776158bbe29593b635f6acea87e177e257d8eae78ec451. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEAR41966835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd01c2bad82990aaaddfff0f8f84409e27826172266657f494f5ea15e702e8b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:26:17Z), 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/DEAR41929145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8261f71c88bb87d88a54de28025615384387f7f74fc26eef676a36f4ae24ea46. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEAR41941721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73110d6423774b8102a3684891b47b250ec7f5f8adca04c7c3d70c8dfb0ab7be. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/DEAR41951274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c06c52e588967375b5df459489790fc313a0d72f7850c2ca3109bef16adb46. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEAR41933414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eadb3f3acf85a0f71f9b8694f850147fc4727f501e1a84fff6467f9967b217. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEAR41988417.