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 0x2d6f24042c8d5e7df480774f0a98006f679a98ba167788f806873b22b32ea8f4. 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/bab647be-263a-4da5-873a-a50c91236612.json and https://artists.proofprofile.net/proofs/artist/bab647be-263a-4da5-873a-a50c91236612.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 0xfe8f3239152015e487528d09d3c4dfdf4e9e4bd4281f32d25488d70719cd4a7e. 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/GX8LE2478774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e4c470563a99ebf3b2597dafa288f048a517dc45cce9db983134caec895b26. 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/QZTRX2476222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae486b709613bfcbbffe3440714cb564912fb5397faf3f664b41cc04de2e2ae. 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/QMDA62286038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7100d746be0ff631e2dfea38bfc685de0b6e95c2a5bc72c55222b01d2bac76f5. 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/GX5MY2230055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa658000af1e66b28eedd7d4916cf48a70931c4f9d9061eb4ac4071e910b3f5a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2271642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcb12884394487a02eba3af0ec0cd396a14654ed32b0ec32b6bd83f840e4bac. 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/CH7812219775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62003bf58e6dc867bdf014d9dca0ee2eb2ad4d972e2a06c1829b60e831ccd78. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2245310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed403e2f9eabf10939018d8c5af46cb00e6ca4c2047ff82edee4d82e7d6b195f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2234755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fba63ba9f6f176a22f40c41f06c95c0c9cc0e3c4eb6a1b2fd2c9bc120d6391. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2237763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeca0f3f3c5cae206206f0fd7d7a1880c57102a484b7f05b4af6b677e79f544. 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/GBKQU2234420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dba01a14eb9efe1bdaac51c8f0d571792fc08a13a581ac0f1f3a7935d7f815f. 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/GBLV62104284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a862bc1ca6a97ab4a42e88cb5614f07b1c83c4886d936e809096e923826d770. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM92099866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a54e2ffb325a1a9526136d66ae724b3bb4e194b1944f39c9a5dfeff0e956208. 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/QZKDK2089337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3113c39875fe22942f8bb7c3ff40ed8d2e0761618c01175b5f961f8b7dbbde0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LE2446516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5490bd2d5b95c78a22affb2ad0d77f197c0549d87c104e6919ced3cd2ddb86d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LE2428658.