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 0xa4f3386b8c9c1ccd2c1aee4372cbdd12ccc12060a2db2f32285ae184f3d49c8d. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89ced8b6-c398-4902-8996-3f4be2d5b41e.json and https://artists.proofprofile.net/proofs/artist/89ced8b6-c398-4902-8996-3f4be2d5b41e.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 0xc74b67f97cc0a0bd081d77f491d0d3676727f1c78d9a2d7ef0580d66f7605e21. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IEWGI2367142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347826bf580814f594a514ee6c03ca7eabba6a4e74eeaee3347040c0e10d5e74. 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/IEWGI2367143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dfb582e85a2b6950afbebdb7628017d0c6ae1ef6649883727ab9446d10d835. 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/IEWGI2367144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68262b5f137e3d17e2bcfdf75d7aa04b2e5ed921f3b5931cb1460f94cfb23753. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/IEWGI2367145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84d48de5feda54bae2fdac46d7c92f19862d7fdbfc72192ace8c2c2137102f7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IEWGI2367146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd177b65bd944d548d85a51dd553f7cbf90c3275882becef435caa4fe7c01b75. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IEWGI2367147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271fb8cb243d39d8a6b93ed4ee04ce983a58ac704ec335d3b810f1eb74fb5053. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IEWGI2367151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe6dded30c840084eef076b22af796228ea917e465d4d0086ec0c5aed660510. 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/IEWNY2351461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7545c339e263d34c234ad3e7fa37ec45fe045b6f1e505c6bfb4c4500285a3bdf. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/IEWNY2422891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fbf1341781a5c6359c564ad9f5ffe30e47eb538ed2dd68e8b534a51225f15f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IEWNY2451667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb69dbe21e9bb90b9cf19e718c6a06235292b8dd4584f1ad39e8b0a4e3693ff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX53U2308131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1233fa63cf9c3073f31204e98f8882e183fd4433c613f2149c852932250f8b61. 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/UKXN22562071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3cf1749524c6422f91e8a75f865210dfd6d57f72d7f36a99f9b706d57c7c8d. 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/QZTBD2544674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cbc684791737675424693ef7709e34bc757a7e0b0907b62b3e3e7543106220. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTBD2544675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e3a50ee29ea373c53b07a78d5bafbca2882bd8a8008f232d1acf66f8a9fab. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTBD2544676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300137f00ce1a71d2222dfb844b5b89467a513c3460fb11633834dcd9cc3c24. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTBD2544677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aac81c6e427763b0cf7c361191e3bfe66acc543b234957fd60f4ba0984928de. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZTBD2544683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0910a4642d35157397171ad49be0ce41a67e5c1558de66b1696c7914f1f58426. 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/QZTBD2544684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dc21d711e79e306bcb752f65f30151bee145fba7b18ba8d81af15a11cfb701. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTBD2544686.