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 0xcebffaaa5527d82984735decc611a6ced94e015d950b52c4c7be627f02f2b17d. 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/dbbd3567-91e1-4b2a-b393-720cdf3bcecf.json and https://artists.proofprofile.net/proofs/artist/dbbd3567-91e1-4b2a-b393-720cdf3bcecf.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 0xe18a5a0528ba1babf1db748f801bf9c245562e1a4522044244268bfe3f215158. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/DKG1L2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718a697851dbe3458c8068cc3a2df2ed2ac1d515e765d4b05ccd03acc87f9c4c. 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/DKG1L2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c6efbcd4b5ba9a201d3dc98daa83273227c00e4768fa413428d555f4993c93. 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/DKG1L2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437fa4f93d5ca54136d8603231c4474af5125c33b589cc884f0949e5c17b8ddf. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DKG1L2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f87b63110ad7c6ff01d713fc2a9074ff6878ad9895e6fca8c4844f3f6bebc06. 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/DKG1L2400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d793c1a07638e00ea8fa415d19a6dca17a073b298030dacb419f37c2f5b581. 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/DKG1L2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11225c7b9f9af74d6dc30eada0555b7f49b1aac269240f0ccb0a2cbdf7116436. 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/DKG1L2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3ebb141cbfaedda3d5b6801af1cfd46143090c8c8692f1f356ded13a0f06e. 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/DKG1L2400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ceafc71c4805da75dfb4aef0c9dd1ec9789a24a1f527bd69ee9cb9fcfbf931. 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/DKG1L2400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0963a45fddb8ba6c676da241374ed103e6ca71d51ec92ce949516ef9c5ebdf8. 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/DKG1L2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8491ee54bcd922772bf8c36d4d0bc4ad6b2d115bdd4456444bf7b0aa849fdc7f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DKG1L2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38fa74ff6d13e51da209ffa30e84af0c8c1f8723230e4a0ea81bea4d8b2d91b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DKG1L2400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6717f314e7765e24efa49c9478ca5eec66ff64a3da1481882be7bc75b2bea48f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DKG1L2400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb8804dbf39decb81de47c04eaf4a9c8ec860d5e8df8a6fba89ed6460a72ad1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DKG1L2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe160b2d937bcbafac0e10033bde694223379e56d9ba343ce388e65bd5582a81a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DKG1L2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e0b31c31faff8334964a884c911127c1c4de69a8c248d41434c0c0aa18a827. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/DKG1L2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f29e0d37cd47afe1c82f8d0cba91f7f774b1161f36f4317918a0dcc53b3c1f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DKG1L2400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e79a76af03e9ba02db1c2e47e6bb5ba8a59e78c3ed00a19d8f99b53faa8c83a. 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/DKG1L2400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b30e1ddfb001a95803ce398f8bcbcb2adf31e1d7a408e4e096b75be24df0acf. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DKG1L2400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1727505fdea7f39d96b75309159f357da6aee4d4c901803c4d4b89e8d23c59f6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DKG1L2400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfeafda90fc928bcf905dec9c56667a8ba2f75c4ce39006a9f69edd82ae5646. 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/DKG1L2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061a8c32de2285c42e424042f0308a93eaf3e12d951bd5e5ed14fded641db8f9. 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/DKG1L2500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f21aaaba9dd7cae6064e74853783074f8966629c68c2bc61ae0ebf3c037e419. 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/DKG1L2500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d17d79d80d52b4ccf94ab591e0a12fe2bfcd55a23f751c5d0b46dd90996e3b. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DKG1L2500210.