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 0xf9c51e8adf219657f9d5d94f88cafa9a6d54be6e4031fa27e63be324c43910f1. 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/5b8ce341-503c-4645-bd04-84861df45841.json and https://artists.proofprofile.net/proofs/artist/5b8ce341-503c-4645-bd04-84861df45841.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 0x7b50506cfd97f1d78e4edbb110efef85b6965a99b5d561795618245313f588f1. 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/QZNJV2409942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29450cb43eb5646c4de7f800788556cfc27f463b7fd7ade67ccadde55e12595. 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/QZW9L2306164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0933ae1dfda21404f6dd211c0302b78552bc88b4117148039228da11c9e7c37. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1607647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7de8baa7fa1de7ae5af2d1a8ade9b846bac0c0c936225206c84af8bc1a9fe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1607648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53b2a99a0882d8d41fff8de98e81469bf77034ec961c62d9102452bf86aa788. 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/US7VG1607649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27701f914339cdbb333ed47e7df0e22a6d29e84c07a9018e83e6d61a0cca450b. 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/US7VG1607650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8f566eb7f3a27a3d291a9821f15fa949f8c419d0496fbac30e58e92962f71. 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/US7VG1607651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf202fcbc30fc63a55599f46a2d1434ccf61d81b822c263a737a324c1c0a5198e. 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/US7VG1607652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df6b7a95edf45f37f5e80e5d9d434a837733385dcfc220ee25e4808d0942663. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1607653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94be3f4e9c48ab5f55c768e1a3068005fbbab8487afa8669bb4cb28efb67863a. 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/US7VG1607654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2072e5ddb6854a243a876566b2fef4b1de9e64328cb1a73d8f63f47c6bad0bb6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US7VG1607655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e3503e50b1f7447d2616a5477047a86b4366b1901640fd6e080e775ad1dc2b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTPX2440269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a084ba9dc9275c6a2bbaa6dd5b8c83a8771f719d8088a16b6eabaac38822fc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJW2071894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3777478c594e1d35c21f92b2affe4805bf159ae6eb92f5e460e6a971f3c00f. 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/QZW9K2210586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f18645f2969860c153e9fb0fb633fbc09e049e63bfb274d7953d038331cb34. 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/QZMZ92521085.