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 0x83295a8e8acb7845fa37641295c114755b71923a823a22e2abb7ea87e0865d44. 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/e93139ce-bc0a-435e-89b0-cee4d10a2548.json and https://artists.proofprofile.net/proofs/artist/e93139ce-bc0a-435e-89b0-cee4d10a2548.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 0x8c2674e41959f1ff34ded9071953fdcd8750cc97b1d3668a7bd26d092134bc7c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/FR10S2265950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04d5e130bb5e9625bd1aeddfcf8439730c9a013a8a26c21ccd88d67dd177448. 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/RUB732051478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6617b7863092111bd53ab355905975c95d22e4b26b3e46c6d76a1318fba7a9b3. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/RUB732051480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088e0190e19034af1d4f69ab5e831269c587823dcaa5a9166bfcfaa5849012f. 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/RUB732053656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bee42f32eb162abb5bd49c23787ace9722b65c715363ca73395131fcd10815. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/RUB732051476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f91768c1a45c5c9cbe13ea91a42d63f606e73a3c19b9cfc6328814494951261. 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/RUB732064453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2191abc0401f54b2a8537f05225f0879af913c6d5457961f6aa3790a52d0009. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/RUB732053680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe754c3f970c220ec432a429ae9898896974c0e6e38f8290bb419d0aee71a54. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/RUB732068801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495a6bf55a34de5b00f68ddffb01188ea52934c875fa69f7ad0d8de4d4e16ede. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/RUB732064455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3fcb5aee4a867b010ba0da435bcd6df3c01fc08a76e934e3574b307bf8b31c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/RUB732064457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2636539cde88957cb611d03fee7d903b8193b7bef039a4688b4af8a5ebbf10. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/RUB732053664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a2852841bb0440c548a4aaccb3404025dc76d570b32defd6450750c364c3c1. 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/RUB732073396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe544e7c9b5216c3f8ac592931755b9d24f9c32a46b0ee93e4500850a640596. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RUB732083839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a20001ef2fc5862fb55eea41d48d24079ebfed7b42a12686c180a156d5d6092. 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/RUB732096976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae6d7d10d1bd1b19b00c0bb13692b72f617b7add3d9ab85482a7daced0d216. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/RUB732094130.