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 0x144531a1f20adbb6b25b07df65c533a105cdc2bbac849aa390fce6cf6e926f27. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7358143-9744-41bf-9ebf-9654f94ee76d.json and https://artists.proofprofile.net/proofs/artist/c7358143-9744-41bf-9ebf-9654f94ee76d.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 0x2ac9eaceb521b91f614be34dbc9e3d0161f6135d6c17433d72340e6ba469e773. 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/QZK6J2341409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed16472eb34f0b6eed918242e2985547a5ae90cc56dc6c2b79a6ea1aaf13dc. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZTB62431180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f4e5df5d115d04d2d87c674c02da7707b0990fd043bb6dfceaa9d051562483. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZTB62431182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da1143c28000e9f50172e8d4a11a09b16432a2902f289964bd635295f7d5c53. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:11Z), 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/QZTB62431184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b724cc314ced7b139d07199ee9a5071fe3e7089db7b386135a80d87d390d90. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:36:33Z), 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/QZTB62431185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8baa3b4893a66d66a48627afceaa01a282fd9dc9a2e6f18638eea20a4925df. 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/QZTB62431187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35deb75dbff7dec8a61ee6dca8bea2060c0f5c5406bf45d970182e55912e209. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTB62431190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65074452d1cad637ba9b6ac285ad6082e806ff4dcfd283f6d5505c2fcd448c62. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZTB62431191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e52f4b148e26f04e22eaa16daceb0852c4965d3d093f244027f585b68f31b2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:27Z), 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/QZTB62431192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216567125f4b25a6fbd9ad4733b62822583f63ae2883f41611f4c19e2e9b2396. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZTB62431193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf298adaa17e564c276b057299b15ce6c07a7a6fe83fbbd5d6bd8c166001a027a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTB62431194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6f54b9f0f47543b24f18bf03d4a74ac345e857e3b200477a106c88ac9fe8ff. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:15Z), 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/QZTB62431195.