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 0x0ef4c675d4934f252d55a7e04c99800f733c328cbb8300175477e5b72e7fbab0. 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/3e459ac7-bf9d-41be-8cd5-ad580ee59e23.json and https://artists.proofprofile.net/proofs/artist/3e459ac7-bf9d-41be-8cd5-ad580ee59e23.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 0x35fd3d5d776786cf4f841b3c5c4a6968500ee116f73f41b989c8f83685217cdd. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCJPH1886933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c301db1cc742d108a3c5a8a3a240d47374ef60b855f6aeacc3ff0bd0f8deaf7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPG1888024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43f3bafecce02d50faff927ec17553968987c1e4b143bb0e6b49e1fe3593fb5. 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/TCJPG1888026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dee83e9795ff4675a14ddd127093b1c6d3a4768f7d896ae029093d9f5ce2aa5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPG1888027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3924061057eb00f180177648d83e0920a857dd7b213a2b0e458879de3b2dfdc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPG1888016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de7323054cf463c0b56065df49a1b85c746c45e24f6b05ee9677117fa1260af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPG1887366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d683d0181cfdd7edd69583d7a1a07c7b7ea2576f237709ac7f4d5e3eff976b. 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/TCJPG1887343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3b8defdb31feca75fdf73645c30921dac385ce4504ef823dd8c413dd66d785. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCJPG1887361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5133e0e64b0cced4cfc17253e6d8137795bffc15450d3e890df1067409a2386. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPG1887370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4755a3a6439c5887f7d8a7806507d808c45eaf4e6ce6e7ce3a1b506483c0c9. 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/TCJPG1887372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d0970eb2289cd672f8f9791872433c15f7f7a534c108a337d0f494ba8f486d. 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/TCJPI1965971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31d4f8277bd7e5a95333c0f622ee21213952b7b769d18dd28eb5c0987641899. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPI1965961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f2d6c7365f47c0cb35cf1f0c4692b5e991d3a0573b72f6fbe80556f170e2a. 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/TCJPK2026964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963dd287fb13d3aee47e0fafc97a334f34770f3fd637ca9d24f6468962c6a317. 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/TCJPK2026966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb706c4d4508123fb66ac974e4820440bd3470b97de66d7e7cee23e38a32d7c47. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:38Z), 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/TCJPK2026967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf860fb3bdff87c69bc6bbf2be24064a4b9a76fa422dfdcebf14f907163e8b6d6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCJPK2026969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab29ef06ac1f501324ba707621e56b490ecc3aafd0832c52594e80f0e58d1126. 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/TCJPK2026970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a88286b1909a164c9ae01875eaffa58867ee74b9fd339d5d582b60ca156bfa. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:24Z), 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/TCJPK2026971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d68bed2ca04cd228d72f7bc349b0bac3213bb4d407efc5e20e206b157d68ac. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPK2026972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6709eedc8be1e08dbe2fff34a4f16870b6d4dc78574033abcb4cbed2c8f8fda1. 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/TCJPE1614635.