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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476aee83013f4746e7f13fa8ec582130a4607e449395b44f135453ff765b012c. 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/c4890692-279c-4630-b831-6370f411be1a.json and https://artists.proofprofile.net/proofs/artist/c4890692-279c-4630-b831-6370f411be1a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a46e72551bad204dd53ce7dff6fe472f8dddef37523ef76252e0d6814634a23. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR10S1442226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf775f7db72c849424bb3f0d8c0ea6b465b73b93ef06c9d6735aba0da16f39d27. 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/FR10S1442227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fcf9a88eea3076e16c4059b0facbabbc5691b94d1e8ee947a5b1b010eb93fa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR10S1442229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf111d8b6019866d947e3fcb4349bd46be3c622ee8ba984378fa178597f34157. 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/FR10S1442230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bea3442a97853e35613a83ea37d22abbced6fbf31349f105d3bc940d3336b64. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:21:12Z), 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/ITQD01508602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa9f494ab7ac6f16aad3815eaba4e43e4c634b971c2b85ac0647e6caf426fdd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:20Z), 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/ITQD01508603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2a2d2ae6bc10d0a9560096dbff57ef5655a0650c0889e59ec8e251c803a80f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ITQD01508604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f3b03452ae9276f9c83754d8400f24359f7ad04f25e4e6d9494c408adcf9f2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ITQD01508605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f7b1d33ced76dfe673b644f53325a41fe13141a946f4d5ac2b8d96e6c9afc. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/ITQD01508606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbb71011f5fc37854b8b51fe1d20a9c28ba40a154eaf3d03257f64362176f2c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:31Z), 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/ITX281800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a76eb652538de8ebb54c9841d004fe3f001ca4a3be38678826971de8c757851. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/ITX281800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0f02c059c541001817a802a49619ff87cc10e87d6dc8be57489787350fb77e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITX281800075.
Cavalleggeri è New York nella testa di Laura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6555fb96b574b67ea748b5ddb6469d1866371a80325eb0c0ae2205619f236c6b. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ITX282100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0827753fe48a1877917467f66baa8ca9f597fdd294ea560d87206ab809e2e675. 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/ITX282100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc6e95152b6b2f4684412e42a077ee11b362e8aad309bc6f8b5efca8926ddd7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/ITX282100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a6ae49ac775a2ed56500cadb20a9cbc99d5ac3148df36173cbc13c4bef6ec. 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/ITX282100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6244346898425777878d1027f66bd2a622005cad877551c350bb86116a3a8d4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:37:02Z), 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/ITX282100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee8fd60df6001fe33735e42243fa639e311cfce125be945abb8948512d4e221. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITHUR2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb107fd9b2dce3a73f78cf3436a5f088732bde291aaa8456d07a5cee5537f8ec. 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/ITHUR2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df5f5e05ed4eda8eac3671836cffbd9d4aeb8e03b18f07b1244b6529f56e332. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ITHUR2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd2caf7adc156ffec8b4f976403b66a2a4fa489f7887a03c2d2ab9b07be9359. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ITHUR2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da0c12623f191d6e58e2c06ba919ba4ac209223db87fb19e400f62ee8699525. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ITHUR2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd091fb69e20cc9d26c5d608dbd2a405fc6b89cce2a1d409bec0ebbc7f734ccbb. 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/ITHUR2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b8e017b089e6be8f2aa1d49cf32eee4fbc6f0cd37cf937daeea2caa64292e2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITHUR2400048.