thumb|Florence Cathedral Duomo (, ) is an Italian term for the main church of a city or a town, usually with the features of, or having been built to serve as a cathedral, whether or not it currently
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 0x609e6947cef172acf5e2e177bad3cfee3c65f24ea15d577ac5764e5fd1d43a53. 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/2e2b1a94-8802-41a1-bdf9-2b278ca757d3.json and https://artists.proofprofile.net/proofs/artist/2e2b1a94-8802-41a1-bdf9-2b278ca757d3.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 0xe9019a063f7d7e4ad76b9e9bde2fb268c4e10e2cdd0b522315de844a66446bc3. 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/US43C1605742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e53a196d4acefcd46046890e9a48ffae4b297708d614fbf89ccc82914a49965. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US43C1605752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29de23a19354af8f112bd8f6261e39336522bec664c24fd0c51d7509f3d158f0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US43C1605743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc95e005751a0adf36503400cd74f43e3dd065c3e11cc62adac78395d3c7552. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/US43C1608577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1f15749a18f44a69eb8b77ad0c4959c65c9a10b5726d27a723fd68eda09b60. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/US43C1608583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23850d0a8aefaaad567fc74daea8dc0e8e4f0ca889a3ac142aebc4209605dd. 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/US43C1611905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc870e5c1d941e0839bd98e7c289fdf1d5c1d5199e6c2b3a4e4b3de3c64ceb9a6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US43C1617314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52f2e0c55003d9cd84434e59f6c27df654b223360bdba4b6ead86d04181f6dd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:51:02Z), 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/US43C1621683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dde4cb873f4307cf52a7e95754fe0c7692fc464e69bc262b916be0d37f7ace8. 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/US43C1621678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10c44eb16b1790df5765e6ffb6ee0c075d1d18885ebe0361a46ad14d95890ba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US43C1628974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54581ad8a7b36bffcb71d4d5f9ed658a99278d4859a13b946ff671eb3526e3d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US43C1628975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c01e38d6b61e5872e6e89b4f98e2ea6ecb11b20569b711677e0622e57acf2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:21Z), 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/US43C1628973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ab511724fd6a6bcd13475359e7d1eb541222914dfea469aa6af75d8837319. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:31:25Z), 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/US43C1629742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc3e3a444191138cd345ffb0bfae47cd64c970059b9567dfd619c3aab007469. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US43C1629744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca64810c90ac5de7cec766ffa67894572568736d89abd0a19da0210787e1946. 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/US43C1629738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e80f78798c5fca5cf5b4801a11b04111b42a4597b13165c2d906ec4133e63dc. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/USA2P2452228.
Bridgerton (Covers from the Netflix Original Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4f2501f5138fc339f842ed076ca1c846ef8c63f4705bff26a018a92deae70c. 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/US43C1605753.
Bridgerton Season Two (Covers from the Netflix Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0469e22999a74b80b2292cf61ad3bb6772f5b5f8f76880f61809d304ae5990ee. 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/US43C1621923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df16d0232cc4fecefb1437e64f201d1a112b541db9bb0a97bfe8ebfb04e453. 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/US43C1621922.
Bridgerton Season Three (Covers from the Netflix Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960506e82739ce543e1e9f353f10e70bfe84052e39431cd2aff925509d950f73. 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/US43C1621684.