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 0x3a6044a80483e8eafbec671ffd3cf9ef9f927abd272b4ed397f17a20b56d3465. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d34a8045-cc9f-4b34-bd02-22fa76895771.json and https://artists.proofprofile.net/proofs/artist/d34a8045-cc9f-4b34-bd02-22fa76895771.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 0x9745340ade83c8e6058b58a591800c11bcff11d2800e83c0a82de24bfeb2c4c9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEU670900736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8214ae389cc01191a1e1ac447769fcb875bbcd87ff320ccd26366322063ec2. 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/DEU670900737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23965333363207b7e1a2d62ee98619ebcfc109bc2a4ba4ddfab6e9519dfca03. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:11Z), 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/DEU671602760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fc57dacdbc2483b0fb6efd262446828f5d6ea65707b10ecf0df6275ae79395. 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/NLCK41055489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27a32d3da67af9406025a27592bb5c59491694580c8800a4c0e5e04461cab9e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMFME2308758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e394fbe33a5a9b958e9a13a306a9dceca59fbc389ee22391cfe557926a1ec07. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZHN32568199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ad5723b9888fa4f39150ce3b0cc62f2e943f86b37c865901b138e01d53ff57. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZHN32568200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb36bcee69d42c71d72b5d7d54d86f23649d6844ec5c1242ac61f14ec7c82572. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHN32568201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8e11c73710bcc85fb374192dbd0953216b5c23081d922b33dac2f811e12d7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN32568202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e6833cc292e57deef2fc8712e48bc9fb2c7f41da3625e25bf9420f60ee4b68. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN32568203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e59cb8e23c1ecff2bc70f4697426628a818377c0986b1ee32a90cab92dc3a77. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32568204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278055094b92438ad50c4af99949f3d92ee90e02046778d0e21961e02ffc2ba4. 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/QZHN32568205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75e66dc132fd714277a72826223d585452ad3de0db9731d397bf78d488b6409. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHN32568207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592d74bba3fc49f3b75cd1bf9b1aa2516fa7bdba47e33a3c403c1c6fccac4207. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU671101240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca0c3489bd811322e61dfe892c8fcb3a0c5422c86b8206a459016e3ee1b7275. 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/DEU672101805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f62c0a9b24bd350bedfa1ebf62c5f978c0447d6de5e1757d7c8b7a7735b9c81. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK41052246.