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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9151b236aec29b06350b560cb1dfd581f8fabf15a3a44eb75666bd5eeacf3602. 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/0cc741c2-2452-472f-af89-99c0c40b0dcc.json and https://artists.proofprofile.net/proofs/artist/0cc741c2-2452-472f-af89-99c0c40b0dcc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4a0b051e3568aafa379030bb4b7e1c69d88fa011fd6bae91d7b1b766d5e077. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPS2278521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c3483c3903449e5e13fd40db998b092ef4cdae7b2a821b962618ff175aaad0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCJPS2278526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0541564f6ea4ef53fd172e220dadee3ee34e5bcf3559bd854a4295e2927a67. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPV2395345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6137373a80cddfbead9267e27d2ef9912f84c88ee156fe344f2f4dbd72d08b0. 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/TCJPW2340538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f45d2784608f4ec320161d35e075e3b1ee1f8414fb046c400ba903416ccf19. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCJPW2340539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f104cb72554babd33bda4912f81ec905d36c023b4ab0fb3fc57bccd53e73d. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCJPW2340547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fccd79ebf203aab921977e99cf44cae645c6e41a8a6fd60509f935759a5233. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCJPW2340550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403778e5d63aaa3f3286da93e95819a102a1337eec9c58712e485f6e0c1b825e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPX2376527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d7a9329feb20d18947b7f31ec6625e2ca6964978fdef448329507cbbb7ed32. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPY2307533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8330731049f2c3b2df261fc4ca56a117c1281ffa179052e33e55cf9b6b0302. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPA2478554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878dce946e61a5f76a35c3c4d4ee1c1306943cedce6f1d833c0595eebc2e5e16. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPA2414571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403778e5d63aaa3f3286da93e95819a102a1337eec9c58712e485f6e0c1b825e. 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/TCJPX2376527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5ff3edae9c96148c8720f7e0b817aa19d93417be7cbffae5f4f9defaff9859. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPB2492881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8330731049f2c3b2df261fc4ca56a117c1281ffa179052e33e55cf9b6b0302. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPA2478554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d3fd9482b2293bd09d4f0b46add3c674f4d6458e64094883ada7d4869f7eb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPB2492886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7383e627335b790fdc95854556a21a83d644ad6cdb14f6e490d23c201aa63048. 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/TCJPB2492895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745a741db90d0f3ceefb79b38d3e1bc492508d00dd915468f16651de52af25d. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/TCJPA2453145.