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 0xb7943ab83c98444056cd184a8236f121f918cdd7126267eb32c1941b4dd746ca. 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/94859a9f-d3df-4462-ad6e-75f86b1f32b7.json and https://artists.proofprofile.net/proofs/artist/94859a9f-d3df-4462-ad6e-75f86b1f32b7.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 0x0d3c1312447faf5a0e8cd93e5b9ea3bc04c47ad57216679792fe877bd252cd36. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/UKR6V2072285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58def7b82ae88de680e20ff4686a989d61ea125aad085fdb8062546d04d1feaa. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:00Z), 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/NL4YD2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f7041ff89553e79acc01cd34a78833287f89934bdd248caf90712c7b6bca6d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:32:35Z), 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/DEWW42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec391c74191fb3ecc6761bf08485aae6a0b868fcc5f2ef46d92fdc7e97e016. 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/QZHNC2358632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87969d2d7dda5ba447e7e5f49e6cc20e7895a7b1ea0602cf4f20c8fc58d26164. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6M2302137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32700d17a596987af3bc1a4846f808e6de0cf1a8a7e0c47ea9303827bcbdff1c. 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/QZTBC2370746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dedf8b261f9b66b4d42d63d991b358178642ed0f10decdc9d9653e9d9effb7. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CAQOI2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26904789ae8e737182bae5271061d9f54eff217499a917e880d64ed87b990147. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:22Z), 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/NLT2H2400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b08bab16a6d8452c000c6c28fc644a2e92584d7faa7e0a106641dde589316f4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITM2J2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89390c7459553971619abe9eadac3b5bac8343217097b4e4b6dddcd90f814e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6I32407926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea5e45260c06d8c3c705c02bf90c4e672edd885754f947949ec586fb5542b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXBDS2469611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea5e45260c06d8c3c705c02bf90c4e672edd885754f947949ec586fb5542b6. 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/GXBDS2469611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b64d014b4cf02f749673e46a4f9d680224e6aec6b6061d814b39ee250041d5c. 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/NLT2H2500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c10a1eb3568ca5e7dcf219d91ab478732a044ee38a37baefadbf20d5f0dfaa. 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/QZWFE2534702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e256e81c0d7c597e0926152f6a4665990d09641ffbb84001f38213df02bc51f. 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/NLT2H2401299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03a9f25a977b32f84987c4b061b5f432ea8a5ff21b48ef477301711a74ae707. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ITHZ01314214.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch