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 0x231d202152316b907f56469c7780099a70e8ade45d5f771ecdcf2d822f07e473. 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/90dfc67a-051c-4b32-abf2-58bdb08bffe7.json and https://artists.proofprofile.net/proofs/artist/90dfc67a-051c-4b32-abf2-58bdb08bffe7.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 0x45fd36d3509184ffcf911b6d0122ff47a37cb5ee5a21e766a2c521115f53fa3b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/PT7EX2000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62533924cdbffe346fc1f2962bdbdc375517711e7ebb51721a4f3d6803b4339. 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/USDY42260640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0bec30c7a2b8950d862af68732cc77c17ffbc9c2f51765baff5d47e9e37825. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDY42260598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50fc03a8186eb93ef71e419c27deeddcfa74a90ed55f64edeb1be3cc48329c0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USDY42272415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87a02496eb11413791cb87694da185e46dc6c85df3fdfe26ae83869f76fdb05. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USHM22302325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485245fde495f852aa9c906597e16042cfdd1a7632f2025fc9e289d87ffcb6a1. 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/USDY42395791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61dec2f15b33dabbd95c9378f779dde4035106a30204292bf5a8a97a05e4958. 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/USL4Q2377427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc717da0f29ad06c037f16033ffee59f52709f127a653001798c96e13e0090db8. 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/USL4R2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a1d6e6834d4e5c8669fe5daaafad6a8e68b33b00847b2739ac17dcc1868f9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USL4R2316739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6792c697145e62595c00875f040be02d3fb411ffb29762e4934574219a6286f. 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/USL4R2345459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3664be1bbd2a20073f44096a2e79b7582fa81cf72155970d28964c5cadab2f93. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GBKQU2410147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53df71a087ccec8c808afe4ec2b69219357e36dce4b966303dc2588d3b4ecf22. 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/USDY42478818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43020b4010dce6b41baf4b0096e7625da37d4b968d5f0c67ba20da96e4c63e12. 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/USDY42478819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4620e4919228d7f874a5946d30199dbac6332201f7b5dcce6687dfa99732aae. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBKQU2442694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1f8019124002e19d6864cd186c32619008f9827e58a19166bcd7f5c6a9116f. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GBKQU2442695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c900f7df83410955fb5178fd76736539f25c32963e3a152063b414ee636161f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHM82456581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51727358863fb9c80f2513f0882e7206b983ca103e0700e6f9b39dfd9c9c04a9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBKQU2482463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cfd882c579eb37b1b014328d617eabcc097d33ce5b0cbc1a001e25ca62b7fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USY242401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa828a8f6882f5bf0143e7b2a9b384937345d2ccc0bbb8d84a4012388dc42dfcc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USY242401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c88ef02dc44749fd4887c03114b8111258eb83e5f6f84d08683017908e7467d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USY242401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8d17cc1c5b1ee55d0cd6b4747ba78db3f11cbc29249e24a8836c5fc191106. 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/GBLV62400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaae2199fcc3664b9d81ccba8597ce0084c0e72a76bea658dec251620be6dab2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62412127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8e54173d1a9afbefaf3f5640d456f850010b78438091f25ebb8eebd9ad623. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62412128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3137577c3d51266d987d74cc2fbe0555ad6f9b2bf4a5b1cbb8b9a514241aae2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLV62412129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35958b6f2539fc79241c10a304e334dd6a447f1ca9211d818f328099ce818207. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USHM22553604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756036183f0521d69239cc4375a667955105bb3072075101ca6470bc98cd9043. 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/QZXLZ2538920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112cbbb277a7111403259e871b132e38decf460f58f13ad4012a9a0d247feb8c. 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/USL4R2584260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe49c79c2dab101889358bed2548b301f630eea3b3a6b2e43ce826b23678123. 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/USX9P2598018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e891964857c716a5852f141fe1aad7047e306207ce7a1c77ef2e3c6287d15d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USX9P2598019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340c420eee834605187938907a15d994f87b7cffb4a6408fb3a42eff66a5d6b5. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USX9P2598020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d68575e50a8cee49f9ba7b6753c6ccf48dd9d4881e73ead8e8571939c09b8b. 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/USX9P2598021.