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 0x467c4df73c8cdc3979912f91879ad0be7309cca049fd091cc4f66b0467876b0d. 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/fe414f11-391d-471c-a4ea-af1a3406c0a7.json and https://artists.proofprofile.net/proofs/artist/fe414f11-391d-471c-a4ea-af1a3406c0a7.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 0x4f549cfed5e62132de008e3744d5d5d5c04b6d7adc1aa3b3a00338a33bf89957. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NL4CP2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274121d903cdb9c1066403499d6a5982d0e87bd7fc18158b3fb2d5ba0052f107. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4CP2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf9b5220981a1da7852456df02ef4efc2a850760076070d3f99ff4468212b95. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/NL4CP2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644cf59a49be077647b17f48cbb9e4ee3d13e008f132dd001a35ad21208a959. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NL4CP2100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f8d7275f47fb3aef58d2f644c8e5ed0f5d2ef05f6fdc79a9141365fd6fae2d. 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/NL4CP2100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c9e138366c4a330cce91b6566a12ca9c53d1b9f94738db16c00e66b4be601c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:00Z), 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/UKXN22175628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790795786a754846b90c2e9da0304beed75161396b5430ba59bc1eb4813d5f08. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:28Z), 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/UKXN22175684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a922fe4c4321de209e13fd03f1476916ed8c3e0e200d8c1d219ff928123b671. 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/UKXN22175762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1e6aef42e2c7c7785598f0dd6ec511b2a2b289b6ab04ce7f0ebc0839bdc671. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKXN22175855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba43ddd5e8df832a86076a40c0f72a8b7d5989609077ad0a1dd345c4063f8c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKXN22175859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3969b7a96c7dff3206954293ed7979fad36a5c06059fc86706925d696fe3090. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:31:40Z), 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/GX3Q92052957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb906a79a0a35954ba03f2a93c85d48924aed3349347953e1d4e7d6d0cc7a994f. 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/GX3Q92052961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323c1ea7e6dbc8b5b2e4fdc7aa93da2ff2567dd4dee062acb8b331578d187eb1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3Q92052972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38165588925b34489ac9646a4e467ebd63a3e89776f65ee934339efaf769225e. 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/GX3Q92052976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698f45040b2b486385e3b26bf0fcdc8df6877a44d46d055749c7f884c933aa0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92199556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7251c3a31cba6d6820a7c92aae447068fb36f1f3d35bfd5163eaefed818e9e85. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GX3Q92199483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a947ff75b56c6337cd65e29ab80fd93a216265982ba910670936cdc99942b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:29Z), 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/QZFZ22212866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f054677a9ddd43258ef78d16ff23841b896a04e8ba6582eb5feaf4ee283019. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA62261505.