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 0xff7b6703f6c724fef8861dc6e71471624696cf2cd967a69e8dadbe470a84a98a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9035504b-6516-4ab5-8626-b2a85e79aaf3.json and https://artists.proofprofile.net/proofs/artist/9035504b-6516-4ab5-8626-b2a85e79aaf3.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 0xf276a07efde97517fae544bf8c09f69f96beb97992461f5b245397869d9c2287. 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/FRX872141001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafadbc2167228cdec5c071216369046d921a1372978025aa6363e0b45b1ef65a. 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/FR10S2206673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e7bb71f507a0496503719d3d8df5f0cde7abd4977c74a34bcb1cd6415a0e7e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR10S2258079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6662325a3e91fd403e308cc5a345e1e892c4865d3cd769e84065628404fce36. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IDB662101253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344b1f15621b785f1abba48e0eba65df624d7f9f7c6b4014564c72006141a260. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IDA832202023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9e0ca7b33df4e3c89c2c25f8ed7c60d57710f25ab22700e15cc0c6a4545e1b. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:55:25Z), 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/IDA832202029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4cb1f51a1f12e21e06d01693c6a72d36627c7e886491ce3684372f54f138cd. 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/IDA832202042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2011dabfde702ad016e40d7370fcaa8fe068063bb1445a53b386c0c82f35bd1f. 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/IDA401804543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aaae6275bbbfd4f7c3ff478b7fd320b103afedf81d3e67b84d436443e5cdac. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/IDA832202078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa986db7382edae08a0ea6ca55e638bd4195fc3c2d35791100bbf9d02e36c8bc2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHB2373343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75140ee78cd5a722164c3bfec7855416eb8d0745942a32e64cdb814248f5d79. 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/DGA062302322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78f745e59701898e59afb51b015445471ff3c8cadc03189a4b476c0956bc860. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:37Z), 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/FR59R2493303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e976988dd6904f77d7bc87632d0ad8400d7ea6f00fd853bc79f449a1e9cbcf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX872589211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b17dfe9516d68f7ae92a581458f2d2e8a835c70f0e9e3e9f83d8e26e854c324. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA062593411.