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 0x6300764a6150e2fcbeb3e4c6f2c60282c90362771b31696758517c12b54de581. 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/cf645efb-2da6-4cc8-9b4d-1aa78af7baf7.json and https://artists.proofprofile.net/proofs/artist/cf645efb-2da6-4cc8-9b4d-1aa78af7baf7.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 0xad86da2c69af06bc2f7db5dd281fe8562e214b6b6e4519d5841d1baedb49e9d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2183144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67e8851b5498fabf1006203740148b99b2a4547d3dc92b178533e3234e2227e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2313791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50095f0adb0f7dbc38af7499da98c09e41d23482fed4768416976250157de232. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ62395883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261348b5ab7a421fcca23b9d266477f536a0e5d03ff8813781c2adaafd7339e2. 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/CA5KR2392880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e03a64645d1adecab3afc68984b5ea2f011acff0d06ea356cde0b6d2b0a1dc. 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/CA5KR2426024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ff1afb123f10808b4c69e7ef908e2d0e2f7be6fd63330b00694372f7b96c3c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:03Z), 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/GBWUL2409517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e05c491df2ccde595b2b39b107cbcf594c796abcc9c1ab332741be8047e595. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:51:41Z), 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/GBWUL2409522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c7b2ae187dbe05de314d1a4ca2ea67ce7f7933c406aab77edca31c2182c172. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBWUL2409526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cec418c6be9a40e79180a5aa1639f29bd34c430dba5519a3ed7dd0cba88871d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZHCR2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d706901bbc0f581e4f073b6d0123f0465b5438116a83c527521c305aad97cb. 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/QZHCR2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ab5923e5a0a522efe8f026ae4c1254d86286535326f08edd725e583c4667a4. 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/CA5KR2257735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d706901bbc0f581e4f073b6d0123f0465b5438116a83c527521c305aad97cb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHCR2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114046bed7595d0373a5fc44add3097ccca4ebe511690ffb79f111615f9d748b. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:39:50Z), 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/GBWUL2085847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423a813d87f89c09f8c6e7d9cd34e39bf6ee32248ffdffd77cc0903a7f5bd24. 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/GB7YL2099701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843df532f26d304fc4a55099b35a7468f58ba63bae0cb6361b3fc89c159ff0ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBWUL1908162.