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 0x90ad9e90ab11b5d3f4cf74f056cfb9c26e9d07ca424644fa0f5908a1f0738208. 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/b1083bf8-f40f-4c7e-8d15-b85c537fe62c.json and https://artists.proofprofile.net/proofs/artist/b1083bf8-f40f-4c7e-8d15-b85c537fe62c.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 0xa0bf2068db13784c4fc1a2ca904ac7e5a52856f5cd685f865d51de1aac897b11. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:10Z), 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/QZZ7R2466992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1444e7b4ae61e16f2a0ce9920b4d4b14f683c8102c2a9ea51dab7308ff894511. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7R2467014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce8c7009d3feb782f13fe1339daf6a729aa59f1ff5f72c961ab182b2cb0a775. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7R2467020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3926de4a3f3be8c9d526682ea303028b52cbe9ed45b861b4f91ab260e350a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7R2466994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878f64afa2182d48b445a7c9b7c96a22b3728cc4cf1d518c92fa01c9d665659a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:11Z), 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/QZZ7R2466991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4155c9a376ec5b49778e4910859959b08bb51acccf92fba79f2bf99e24320e13. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZZ7R2466986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9db5353901b1c63f2fdf4beb0788f6a54a49bec58e6d5e4140c3163857284d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7R2467440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906b8caa7a68fdb99dce09bf4ab0656d60671a14a5929a6a89bb01f91db476b1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7R2467438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe62303265fde5a03303709d5e3ea11b403ac5c8d1f5ed3975310c586a53ef5. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZZ7R2467441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf577c3faaee567a4d5fe6bdfe8d37d33cff6d5fd31a71fc535533aafaa59f51. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7R2467436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c24d3c77ad28cb2ed1efb533225717912a0d707f20a62331c7a6265b9c7a8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7R2467457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358648cb5c51fa8a2bbb1e07e815587f7716e9780883d43d3f18e8ef0eec6139. 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/QZZ7R2467443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae99116268c2a01bb5277b37942efeab01cba6fd83922f74b44117f945b60f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:40:03Z), 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/QZZ7R2467427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134f0398bab6c8b33440acd0b1f9fa47a2b26ddf4e4626e958e124c5c5decbe9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:59:06Z), 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/QZZ7R2467437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c896cce1d9f79ab0434ab9a57f30f06d3f0d69470a15841cc8fe95c36f9f5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7R2467439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71469ce0df2357c076eb56956c125a3edb8513ef46372c4ce9af830042e2d68b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ62588765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5527e1cdb55a060dacdc1daa827d339e4371046ac3838e7a41bce78d56dd94c7. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZRP52520110.