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 0xab2a036ed92c71a5901332dac369b3580cc0e82f197e2dbb0bbcee73833d5f4a. 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/67bb481c-d335-4057-8f54-8672f19f52e1.json and https://artists.proofprofile.net/proofs/artist/67bb481c-d335-4057-8f54-8672f19f52e1.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 0xb5bbc881f680c1cdfaf7efb0d1495d1877bff17c066057a203ef5f0f0dcc8b29. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:12:10Z), 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/DGA0R2400600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a57a73c4c9b26d171c421266a3ca2f8bbbdf3bd735df6aaa5201fd86080f1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6541823814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae89de6a29cfed6a3a444f85691d16eb9e752c7e01cdd0aa1190b3b87d44f47. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CH6541823815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12fb0b29c31d490f7f55e366b5f52f0331e6f5bb35da6d7fa0db1367700807. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CH6541823817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a9b16eba727bc63af704e95245cbac8f3c48c9241eae85144d728673da4b33. 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/CH6541823822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f4ae218146f939ce74080666869e0425fa3a2f6439a6af4a89fc94d6cd4e5a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6541762129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616e58ed12cbddd0fd9da132a2668548b974ee8977109c86bf7ee5e6e268964. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:12:02Z), 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/CH6541762131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399ebc292ad543407f89198c575dd112f6a70730bc0405c13ab1a8cb0d933ae8. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/CH6541762133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3178eab2e879e3a236df1ac071645161cb86fc217f5d422843b72b7eb726b6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6541762135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764f2da23fe173dc064ee3baae85001291214d80faed4da00d18e1e6298dc087. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/CH6541733470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d6b5fea7eb1214a958e0fabeb797bd3e0b169670eb264d63def0a8932b3d5b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6541733472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8b52d89c23aad08176e76a64db93224a7d4d03ebe5e0ade90f921f8c0e69c6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH6541733475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9c792503b549abdee914325a3c46619c31f5436c4627b094b46feb4a5e233. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:11Z), 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/CH6541733477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4077768eb74ccda2dcc3eeb8ee3cf4060ed1b088d295ec91cdef1a88c576b7d5. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/CH6542352175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab52d99e270ce2feb3140df2b5341d1cc8abfc62fc2756193dd7d62393c7afb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:54Z), 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/CH6542362503.