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 0xac8692762ac7a84b2f1df17b1c36d280c269e26e2420fe57c2dd5bc28dd1a826. 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/785f0a70-7691-49ed-a66e-f52b471e2489.json and https://artists.proofprofile.net/proofs/artist/785f0a70-7691-49ed-a66e-f52b471e2489.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 0x53c25e889e0f646e2cc726c9962d44b651027fe353ef1049bb8d045e167feb9b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA0Q2311213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9911beb568629d3738d1af585fead76ddc6292c348249276b6a43ad74e4868c4. 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/AEA0Q2311214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3a18f458fec812c4436a1513963d18c0b165b8bcf0a3bdadeea87202020e58. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/AEA0Q2311215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34f30f59046d8d32733a97c9e9dee4ed6ed7c1c9d322b900a6162fb0616bf3. 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/AEA0Q2311218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa829f2e71465d0301fbe4aea15f74efe8c6de5315aa3dd37464865c66072a0e8. 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/AEA0Q2311219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0e15b3b4c35f396528adaec6c663839fd49f28062a818175833c649edfcb9e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/AEA0Q2311220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e3c42bb8ed4359001803e56c4747339d7dba4abfe3206b18ae4e4c082cb1c. 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/AEA0Q2308365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fad2ca00c26e381b81566019366202971eb879ae3191a167380688916cd5fc6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/AEA0Q2308366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9df3a426ad631179ad3153988a5ff8611ab78dc6cb29bfd39012a7d9aafafc. 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/AEA0Q2308367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105dfdef0cbaed7f7c518020193ad2559bd6b884cba25952a60fca0f7cbe1091. 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/AEA0Q2308371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4eb8016640edb8a07eea193ed9a2cf9be728c30d703868884fc2c69a91c185. 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/AEA0Q2308372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8ec49007c91bf842cc71d862adbec3e064b875fc137367878474f10fdb5207. 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/AEA2L2391548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d3dc774f394feed8eb92621f0aa0be6c1933ff72ffa247c634635206cb10c. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/SMRUS0078360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a8dc3520fa912141b274e91eca5e7fd164fb69cdc1daa4de5cd1740eafb82. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/SMRUS0077181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830cf64281692fa430f0fd51cdb78329007f45079955b7a8b12df1fd3ff1d17. 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/SMRUS0077563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d07782ce9ae9253f21a609a9828dd8d01d3c29270f85d4a72ca675ea8a9c07. 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/SMRUS0077721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3422bf13da51ab91fa7a03d0e80866d2a2a71cd8924c3f6198ff13ff2b105ee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/SMRUS0078466.