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 0x8bbb342dedfd9824a14f54756b1c7189c27f99f86afcd9a05ce49006092ee16d. 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/5f7bebdb-bf94-42b5-a740-6e5b116ce61e.json and https://artists.proofprofile.net/proofs/artist/5f7bebdb-bf94-42b5-a740-6e5b116ce61e.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 0x8c3f1709fca21a10314bcb0bea5b0fb70bec86afb38b48f940f688972e659fc5. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZMHM2536214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d274f4f33690f52aabe320ee5d391a726bdfe9a1263b444e8e31f401142c3f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:22Z), 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/QZS642531134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e023a85348f5c66e69edd9531193465d0f13b14816206f73577a3979b3f9fe3. 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/QZMHL2588055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f682f13f41d8b6565acf26c7b853794c0a220bc9885003455f5e96589f7834. 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/QZMHM2534567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d5684970500ba7821c7548203a5aa019b61d3ead8a6c2c13dfaa94e6d44371. 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/QZS662482889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c91df4181d9b0c0dd89997cc9ddf4cb68db4889ec36c47a332d28e2b24f9a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS632597005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81e66a8f078043fbb2f59df64ab647d1644d216bb51e01bf0a498dd5281bbca. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:12Z), 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/QZMHL2529101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b1eddb42b06901023ac12beee3b79d5b444d2bff441d303998602e8f64700b. 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/QZMHM2591473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee48e847ac14b821e7299fccd9b2e9983934111841c0e4bce7354a23ff04e5e2. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:25:33Z), 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/QZMHM2543807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ad5bd66f94b4ddb2a500dfbc2e35021423aa586c5c26a62fdad81088359475. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:35:58Z), 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/QZJRC2519997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867edecdb29a6033b06c3586ddc6e6873f71bcd0bf27db0eced9b30feecdb65e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:37Z), 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/QZKDK2552603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e58126ca4677ca19f4d8247524d4d325c1d2f55ef1ec9e8ac4a9eb312efa74. 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/QZJRB2587273.