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 0xf1d660f7f0414089bce17d68ffee031b1e6e7c0116e773757b93f5458b59588d. 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/4450cc16-3d00-4c52-a732-b2176a8ed804.json and https://artists.proofprofile.net/proofs/artist/4450cc16-3d00-4c52-a732-b2176a8ed804.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 0x7b0276f927fe8fbcec26bd29d72ec75cde0c6b50e816037925d244b8ef9e4751. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/MXD782001272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7537e092fb645148260199dd7ffbc9b8c0f82e487850739779031c4825e658. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CA5KR1841525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98578687cddb0682a5ff3778ae95cb25ae499e139bc808d5e2180cfd623e39b. 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/MXD781903897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1401591ea3b822917d506bf3d3d5d60ed162e1170fbd359588d43f446ca197a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CA5KR1841539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2dd7f3d2b84e5f18cb22331143ebc3f0fa2e9ce2dc944872fb0f2202c5767f. 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/QZHZ62297131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d0d85b7d4db7b7cfcb3529e0287f678fa3f05bfc801b80650011586e8837cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR1708092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219628a44f932984128c62352da9c790365b60f72ed49fad7493b0089e7cd63e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CA5KR1708101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bb7da3d486283c71a199d2b08d8912a0fb5cfe03b96c5df6b04c027d3b690d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5KR1841531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ce550c87c9322108450c4337e8c2f056b32912a30f9c9953f5b1e91c42a210. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:38Z), 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/US7VG2218288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fe303c301189b83859319da4e4ea87443fe6286699ddc103ea12ea10113ac. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MX2832563722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e546fbabb53032613c39741d14aa81b3192d24066ca1cd53e90f97894929ace. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:01:42Z), 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/CA5KR1841537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a0b86b84671d4c2ff87f332d2c939ac8d88a813dee4d89a2e38377af520da. 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/MX2832591257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f98ccd22dcf0a5792941c9274085c387a36780943d64b050f8f1983158e0da. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJW2436019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a545346cc333dc27b5edfe66c2fab331e40ba5363c7ed852ff1c411d69626fd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR1708104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84565ab88e7299af9fb6ae52059f42adbdd9d7a884e5e442512c150ff5bc42de. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:11Z), 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/MXD781903891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd486725657084a9013ce3b56add9417379f283c552b6d637de9a8d83fc96d9d8. 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/CA5KR1841535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635777341a7cc36dd009efe81c1fbc321c4eb2fd2e66b5d1fe1acd9808e5cf41. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR1708103.