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 0x269e8a936d76df80481663a0ec5eab8bc7c1db24cd946d1df7f6ef78a4a26837. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4965b727-b5b8-4a96-bf52-fd114f8f8840.json and https://artists.proofprofile.net/proofs/artist/4965b727-b5b8-4a96-bf52-fd114f8f8840.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 0xb127512956c6d4975392b2d35363b0b30b3344f36a3919a4821712202e91dac3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650c5697fa8ff0d4b3682b3210f44d654433401174276ebd0d061707b1f7a4f1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:36Z), 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/US3DF2405846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582c0b6b0eec6f90976eaa4b46dea4edf150de7668fa17a6b73b25522269b75f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3DF2405847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e202e3c040089c21dcdd3c7954d09a1589e24b28cf5b273022f2691b30e6c81. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF2405848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7088d19e80cbed5309d529fbc2fff7bec0c18eb476d9fc53584e4ab3ae67749e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US3DF2405855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699ad8f5dc4c19977080230e6df506ef2d7fab4d05513a146d8631d1e5fdb464. 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/US3DF2405852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa3488dc474e61c2ffa0e1f791bcc045b71d50531a4b1be0ff2e8aa8f24778. 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/US3DF2460045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cf090ea23abfe711c47706d38891cc5eb35966b65f497772a6dd383112e639. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/US3DF2460049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09434213ffcad9914bff19eba07dee868fb906d3e317a9be23b7a2304ddd7c7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USANG2491223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e9d1a7261d86f616e0f92f210b48c04a70faf3367e9a1412cdde8ce32483d4. 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/FXR592401911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15455cff1b205d0d578e422bd0953dc1cedb7ede18793bf1e7f4b8f8955ca5d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:30:04Z), 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/NOPTR2518020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed47504f61813c28f3f5ef57c4653e7df2f65ae46c7a1de7cdc71c12e021753b. 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/NOPTR2518040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e0f82797b59c49b1c1acf27cf0836cdb6964710a9628a0485a0f4a5ab8890f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NOPTR2518050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c16b89792b4b4cc194368c38d1d56569b16bac95276e34f165818c49b7c294. 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/NOPTR2518070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078ec2d1353275cf604a3b8abe10d71952424f76e13f1495d3924a16be26d120. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NOPTR2544070.