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 0x4c5a6e4d6f83fa8ca6a7dfe0daffcbeab81ac32794bb2d83d156a347ee6fba00. 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/13704994-7fa9-43ed-831c-729355887fb0.json and https://artists.proofprofile.net/proofs/artist/13704994-7fa9-43ed-831c-729355887fb0.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 0x8bf2248a59b29513267982dee411769cd1a3fdfdc0f1b77fb8f5a5f08a6dc997. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:37Z), 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/QZK6P2142178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6498e7221b0b96fe328210fe8ce3b9d55f78a4545d8d83f92bb2eed9532f980. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6N2113442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3800732e857e0ba07c048c9bc34ecc988186983255dbefb0bd35a08ebdc62c2b. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZK6N2149048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43118b64782b69ab244daaf89d64997ca0f10953f814a9993c83c93d558bb1a3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6N2148931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3deaa244cf90e81f7554a9c8de6cb8bfcbe0deaa51d4347282e6c3b7086060d. 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/QZK6M2136036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80216dba4e1cd3f7f0d49d3711add7920054c4cf96f54378931699e58f0a1b2. Chain 2 (Bitcoin): anchored in block 957566 (2026-07-11T12:26:02Z), 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/QZMEM2156188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72621d318422b8b1704189c233b00c0252b54f1c65ca23078e01af48874ebc68. 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/QZES52217181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc8739626b4223f1f2f76ef55be21f34a24db6659c8a536f51592a33772e63a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:26Z), 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/QZK6G2289695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f7b39c8606156442cc7cd53f504ac6cd0dd998507c8e9936ebac95790165f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZMEM2293521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69886cdff9d20f7e2b2481d4f430efce3dbcecf6762235c0cfd5e04c51c4e0b. 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/QZTAU2239960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c37c390d696712983b736b0281e07963c8af263c16c304e6bc88dfdcec2447. 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/QZTAY2227355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e257dac3ea516eeb3452108749ee2acb564d540368015d8331e654d53c2a3f7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN52390220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb27c97e6ae4646eba43f2327b7a71cfe08f6449326a2e834f86ca61b2178036. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6H2439921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a7268963ea5d4267374e00022bc719c04509f02e67891d4715ece25b66bfc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2480212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5258afe31cbf8a5391e9b3a48d4af7e834742a2969ba6ee7b56ce18dbf5cd316. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWZ2437309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf094275ca6315bcf482ce0d6a063b2e21a1ea9ab7f24b42c1ee21fcd9375342c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:59Z), 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/QZTB42411329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcb6666f06d649a58869a40ecb2a0dd1cf108f72301fb774eac0f5075252605. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFM2428072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a066447278f972fc773474ebaae5f2894affefd99efbff14559553e3a778e4. 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/QZNWS2409965.