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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c255438005e4d2196c191d41c6e1b407c505154a72d81b665f02d2bf7ee7490. 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/5968a20f-2e25-4649-9954-c79f55dbd803.json and https://artists.proofprofile.net/proofs/artist/5968a20f-2e25-4649-9954-c79f55dbd803.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1cd7f49c0282e83951d96732e91379387df3d56219b0d3c7660458ff908af2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:45Z), 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/QZWDW2210619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64fc6f6b17fed4c59fedd81870c4e4858dfde6c01d355b6248f05d6652d9c0d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDW2210612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97abc0c80070ca5043d7d7a7621f592f17f48ede2cfc5978f9ad19a9c16b0f27. 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/QZWDW2210610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec9289077a6c07809d64474774012a6d7f05fb8f0e66cdf84140c83d66d3c62. 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/QZWDW2210634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9fed40dbdf2a93fa3cc5d6ad873ad595d1ca252686f4e38d63a52d73d8f7b4. 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/QZWDW2210631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad211246c0b0fe2396337aaf2f4d61bff214f54d0339f081874ff61334cfd6. 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/QZWDW2210630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad0af71bfc4f2df0621193ca1757ba9a28f797fa18865f0df91db8a72fdaaf. 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/QZWDW2210629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ed587ec8d8e5abe9e1db5266e1c0eee67fe458aff0c32fbde2eebf01f86264. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:20Z), 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/QZWDW2210627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf1c0854b15157ad92e25f80e6b60df667511604ccb1431b37eb5a15eb68062. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWDW2210608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf1c0854b15157ad92e25f80e6b60df667511604ccb1431b37eb5a15eb68062. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWDW2210608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ed587ec8d8e5abe9e1db5266e1c0eee67fe458aff0c32fbde2eebf01f86264. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:42Z), 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/QZWDW2210627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e184a1ec4bf106566b3401edbafc837fdb6543b5bf5ab27190daffdde8458. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWDW2210609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6f026361b171ff4a7364644f75f8a9d92ecc2e7f08f333e384d59a3b41698. 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/QZWDW2210613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1414d8f59990373bc83887851ac30f87388d6d227aca15fd048d9cc4b00c0f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWDW2210628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad0af71bfc4f2df0621193ca1757ba9a28f797fa18865f0df91db8a72fdaaf. 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/QZWDW2210629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad211246c0b0fe2396337aaf2f4d61bff214f54d0339f081874ff61334cfd6. 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/QZWDW2210630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9fed40dbdf2a93fa3cc5d6ad873ad595d1ca252686f4e38d63a52d73d8f7b4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWDW2210631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf4134364f0b896c8319995f6a14650b9eee8d78c945885eff0793d0fc1afc5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDW2210633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb444a4fb03d4f072bc78b7fe1b33f47e1f0d6481ca6f15c75dbfae0ffd4c3092. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZSYP2318254.