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 0xba40775ce4f99ac0caf19689a5f64688382b98f9401963a16d1917f329c61e99. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55a91213-9661-4e81-b27b-c4f9619995b8.json and https://artists.proofprofile.net/proofs/artist/55a91213-9661-4e81-b27b-c4f9619995b8.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 0x937b1a08a6e88a13aad7681d1e56d9d52be9955385fc3227ff020ac3fcf50739. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2244443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf321f28cbe5813fae66354193053a85ab2b1251564e3ed4e053d8d27ca90313f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM3DF2244445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbf3912030f89e1afa67e18a8a3114e563332bbee4b0d643bcb0fa64dc98bf4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM3DF2244447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec36d7d227d636a8261d5ae5a7cf650c14a99c8b7aa5ed84faa78b46f3a3f536. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM3DF2244449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7019534808f70bb7cea1a741e65f6e8629d6502c12abebb0079a19bf4a6f0c31. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2122182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3419ae6a0f2a0b1e77871dae8c8eaecc6c2d39dc9432604e7a2a448bc30f3a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92439905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f10ce266adfed847ee6f486ca1fe1ae2623e378bf1da02ef1ecaecdc675447. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTPX2355155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2901c3d3f10554c2d4fe4b9a46d7b47d5d9ff43e5b082de2bd66603f0f2c3e69. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM22380121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aea16a1ccada8df39c2d2c95204c2e369d7f4fcd8047ba73913131b21fc57c8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9M2201655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a9faf5631810d09c4c28e6a1cda495ec9fbb4fe1e66012ca1eb1f944d6818. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJY2291699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87633a99dee2b0195d93a6fa9f50d12df205b8b31b89976ddc2b5f9aa6b56bcf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2113168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00be4dbc7b09bf51e34ca5af598d3581d4652e0220c96f2a954224af1bd3bb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ62126095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8254b9006c6c55e8e1aaad57328dafe43492b250d412b5940e24733dff84626. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB2401905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d124fb1f9a9263549a9d3dc2d827f0dfa25306fca07f69012396aabf6d34bc6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2403921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5879f8db450ce94d4ca64c4cbbd983520c4740171713a0fea30c18b790b76925. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92473539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bd43ac7fe8de0ae34a35e551041fc0e56d6d357687fa9d0fb1d74299f14712. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92473479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e45cc75a78850925b547169a89f687c163220e3f81f5ecd39c39c74b772bc8c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92409504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e61af8e262fab480b809e5c7205ade8321493fc7f5b72dd4084529bf58a00a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92473503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa043d4c6a205a767819eadc5d4fbc9d192705c0b0902c0816c7f2ddd17faf48a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM1980042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd347a4f1e1c01ac15d932356bb622c9225d557c925f2122697e59a6919a309f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJW2456582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2199935a892dff7f0fe7fbb25d925acc86a6b698a0405b1b379fa0c2b501e412. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZNJW2456577.