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 0x2f697c8da1e7d6ee8947985527da3588ffd6edfb8419205884e5dea1f00c66df. 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/59e1b440-83e9-43c0-8c85-a437d61cbf61.json and https://artists.proofprofile.net/proofs/artist/59e1b440-83e9-43c0-8c85-a437d61cbf61.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 0xab788ac2dc08618c69b1a0d516c7678dfa7fa5d068d72cbff7a7ed4cebb22347. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCSOR2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cf0644fcdce7c332d5d362a16f478d12d47a1d627b072d823df8dab6dca5e1. 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/BCSOR2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbb73e132adafb7622fbefbb9cca48947dd29ace95aec4fe8a7acb648eee465. 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/BCSOR2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b79200705fce14275d7d872590aa3bd45b5ccefd219ac8cf608de37bef4740e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BCSOR2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e5e53a9bf64e364f93724d6ed9991988239887faf317d81b97ac1f0f83630. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BXG6R2401226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185da4a89ef346d5ca49f2bec94c48baf12c9a0d88c7ae839af70f52c99c3944. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCSOR2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8138f2e9c326da5c1fea928668336af673ed14bd975ac1852c52018f5618031a. 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/BCSOR2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2eb9423dce840247ec94ba32e201e21e110c08df57a0c818f6ea32dbd7b15e. 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/BCSOR2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6dd50271ce788fc65683d798d3b908e70985c5698dd7efb7136a579c7a29ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTVM2435470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aebbb4d61ae00e35aea4de0fcb0822b8a4a87b905fd58ef523c5bf1518c461. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BCSOR2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c9995a8ba175040e46e71c22bf5ec7f1b5492bbaa069b7fb13b367722654dd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BCSOR2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82c28bbc9234db5cb3de25f14bd2b4202a94bf1338b267ac3315e53e089e5d2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCSOR2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41428d2f7c5bbe522982067c4c05657a30515af5e69a133aa11421eb4a1d0146. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCSOR2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bea16e9c9bbfbd07d7faac2ba193a5150b6cae88d428dfc155a599e7005302. 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/BCSOR2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60fbf35ac1246314742afb07b34da5fd213ea1f55edf5fe34bcbc94497a7772. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCSOR2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5206a191fb9ff4db5033b65da9c17af0f55f58b5b4d9d6171c479b1578e63441. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BCSOR2300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8be45d961fe2e0ad72f17c66aabb802111564d9a1d6af5cde1844e4cbb922a8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BCSOR2300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21a166c19a6915af4a60d8d06f1639d3190d33e581dc580e04f1fd4004a2b29. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZW9K2385175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a4793ea403f1991f75428571b3ccc7cb33e86100a39d56f570ef4df0a133e3. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BCSOR2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d1ae9f8b5aa0adad7e025a0bf8f71f07ad2de8084a56c5744b8593e5818c18. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BCSOR2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a93cc1e24c962a0356b94b232274bcce6f9264bf4d1f3f5823b9d5f3441323. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BCSOR2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc2602dcfaf378acbb07810b292f29b6d86c437fa07fd0631fa20c217378983. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCSOR2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc3072a7c8c5209d732b4727bbe26396fe8f85683545dbb5c954c7cab14eaea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCSOR2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41b23e8b7fd13664caeed884f48c451bec2ad2bea2283b7c9900f1af26eaf39. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZNJY2232500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6453c1ec6cc61c181cd5f0ec12c7336f6ce5af51efb290720fb2ffe23f4446fd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCSOR2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67e4cbb905fa3a7f27bdf1900a43b971047ed0dfbfa8dc89d7080297737b31e. 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/BCSOR2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a5eeb458f9e107a140031e8dbb8c9eac6eae3d681314f49d0c033f80f8d603. 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/BCSOR2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8ba763931a720fd7835371ea26200bc3a60d9bd3663f09f5e245b1dbaa13d6. 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/BCSOR2300106.