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 0xe8535d27c579942ff792bf432323f487b4ff4cccf68d2d3ade812185a3b113cb. 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/360367a3-6aa4-43f9-8296-654dd1dbfafa.json and https://artists.proofprofile.net/proofs/artist/360367a3-6aa4-43f9-8296-654dd1dbfafa.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 0xe9cfe5a32bb55f1cc013e2d33205ba54a27a60f4aed1a4c4bb57bda2af2c51a8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZHNC2243959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762624aee45ac83403d0a49c4c169ea91467e448b1385e49deae0d991a66277. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZHNC2243960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d7f4e92db94a210e8e067231aed9292df151eab6b0f40c0ff2f9a62262450. 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/QZMEP2205692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf855e0df5b53f83528617ff708aab642b98f065e4367c8deb79504ce8cf7e0. 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/QZHNA2430596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d71b1a60d225b3819d0fce1ed173f41db3793d77750e7a39f87c761386414e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2436661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af687e2051f0d91d3c52ec03e82c7562a76a6b7e8e850a13d025ccab7d20307. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2436662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3fca4cdda3356870c1e8a5e0bc445172c7db29bff95697bba9121c4919f09c. 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/USA2P2436663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e71fc36728c5df2032926f4c23a66ec38136b18088bfa96aee43ce72d3786. 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/USA2P2436664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68c7c5cbc051a5410b9f6f78d76d3127981d0f6fe38548b8a6dd86500cc91c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2433351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea2ee2780cc5f9ea8b2c1c697db73e9e1c504c9f707793b6ebfd2bb015f40a. 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/USA2P2436665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587cdabf29e3d1f0155e9079a49ca65fb0e797b82244cecdda1c58d9bffd7e28. 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/BK4DA2462502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d5df9504aa85e145a88b32a9f782b7a533f206125baca4e259b879d3dca2b. 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/QMDA62327226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f05b13918c5fbecc8d33aa39d35c1e15432d8f1c4fb922648b051fa2185b4. 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/UYB282433585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33656d37d526b9c389bfc6240f4ee4f8ae6526d2360976ae70b64dc075af64d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFMG2314484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e4a95e4976b668b7335ae9a2b0025a4129514594337ad90cab16925dd5dc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282498897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9aaccf81d5289abf18fa8c57e48bc3ecb2f84d2d7adc8bdd504099b4998e7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2463746.