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 0x1096b21e696c0d74e763cd84f06626cd7dac5520faa65ff682842396188a66f4. 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/1b077387-d788-425c-b1e9-92204d5ad01c.json and https://artists.proofprofile.net/proofs/artist/1b077387-d788-425c-b1e9-92204d5ad01c.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 0xd55a956e64ae7e6a34259fbe3ae6b3bb52154170218fcc63bd2526442a73f2ba. 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/QM4TX1899381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83016c58212554a81324422c9fa3cdf500dcd96b2c94f037b69c85ea5c91664. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ1845820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc032a1ec3f114590423dea2048b6f3f2fcbec076bafab43b3a2edf0569f0b9. 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/QM6MZ1845821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c40059f1cadcb9617a29442a8544c9aac30d1dc5a94be301ea665df9e5e81e3. 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/QM6MZ1845823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9725530aa8d9e72aa645f35e7f087765b985d40940c6928438c681bc4c350a. 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/QM6N21804790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f440200cbe23ccabd59dda80767156a6d35fee83a38e07891094da095bfbd2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:29Z), 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/QM4TW1983757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8373ca2291ea525df55eebe8f78a040d20b504fb52a31de2ef886da80db82cc2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM6MZ1903048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2f98c1e52904ae8651ac15eb0a29dbcd12ad5ad85d9d8c171dbbf6fbc15e8a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM6MZ1974107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2f98c1e52904ae8651ac15eb0a29dbcd12ad5ad85d9d8c171dbbf6fbc15e8a. 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/QM6MZ1974107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e09bf5bb1e2a30e4731a61959c56b120e4fb43485411069876ad0d87231a715. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:34Z), 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/QM6P41995460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae98abcae3771dcb16fd453e6e8c63c023196c225e2d47888a43bcc1d08770. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM4TX2017098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837257ffe5eb2b29e2429e2f823c27f5d3f6951639715fe4d5fbe96fec8668f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:36Z), 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/QZGLS2032590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f54a21798f107d502a3ecf476783db709ec77f3e691d44202162f90b56787f5. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZHZ32052656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4329e1aaae08f40f3a2da0debcf3a9ad7a70eb8d5ed5bc341f54d65a9ae2cb3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZHZ52050133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4b22cca90ad7386fc4f2f017a271b8ba0154b3a0de7705fe5d4ce90cdb87d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:42Z), 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/QZMZ92092908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96ffb4840d6e3532840ece91f4893932e77c2dbaa722c10b71d6f1df8143e40. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJX2047729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599540673f214795de4a7652afc74f91ae84507a29b3236d50a5b2debcbf9f59. 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/QZMZ92124115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3105924ce605b4479ee460a4bce4f12ed3711da26ab6b6b430a81fbfd334d7. 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/QZ5AB2205534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bcafe90bc071b0af3aa29878be16de678bf7cd3f6f8d330a99d01315aa2464. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZGLS2228163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9241bda04f85df747933eb9b4e2396de0d85ec774c33b7c33ad6d3eedf03f05. 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/QZNJV2249613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49416d2bee44fa0092e809e8f0b1194c2aa0d025e0b25f6ac91a3e21bcac8a0c. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QMBZ92303109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e23d05d500a2329ffacb18f6c1df7e6c59e89ccfe7fee1e9507fb2432b289. 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/QMDA62475836.