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 0xf367cc7795f2a11d995a7a076173ddd90f688123b95e43609c8a09f7c3da6c50. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2ba3e90-9809-436a-8c08-2744e979567b.json and https://artists.proofprofile.net/proofs/artist/d2ba3e90-9809-436a-8c08-2744e979567b.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 0x0cdab627794fd22ad983effafdab321116910ac923a211e6e6a6b2ffbb3745cd. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZGLS2250650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cffa3936cf766115a29dee0005751b32429b2083e562e94fc109f932710e3f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNJX2297110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e06fad2fa219b67fcf9de09f865e4b369baf3df9ddadfab1975195a7219b632. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTVM2227173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80437ae596dd95ede0e1d54308c8f6e77822c129e6bbcb370e811c4dd7849b37. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:25:27Z), 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/BKSAI2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd586830cd9f97908cb7dadd1d9373bd5d41c662777256c901de5aedf5465dc. 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/BKSAI2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d196f34802440e88316151a1fef9a9640497fe936d8b1c31f9c13a181fa4a8. 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/BKSAI2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3a0d7bcf44d674ba4868649fb04c2d91a0a2d52210db6842c0c8ad17591e80. 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/BKSAI2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1546393430ac33c16078d88f1963af57e936ff85c3e43b2768430a6112aa573d. 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/BKSAI2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85631b35127432335196b0fe3d4a3a15cda8ffbf7313f038c903b26b98a77a83. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:59:14Z), 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/BKSAI2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3385f98b8b018feda7d52ac699265abb37331f3c0438e9181846c736cf4af. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BKSAI2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de7fae2a4ff7d8cacb834b18767c60cfd96b02600b49ff3503a67b942e40787. 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/QZGLM2457459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db8b2bbaf23d92425e5c9971cda6bad6f2f0f1ef8feee70c46274efde17633a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BKSAI2400025.
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 0xc3a12012f56698967f47cd384c782e9c330f01013bed5c87d7be9b53acfd146d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BKSAI2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398df05bc4a9889eaf49725fe3408d7ce2de0540595ce0fece474caf85470d72. 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/BKSAI2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd992a5a654f4d4d7fe366506fb244b8856f0b93a27e81b0acb20ea874e7eea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKSAI2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bbcd7b17fc91ef5de1be01f981b67437191ddff70427e91e1219842a7d6b9c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMZ92480259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4d64ca57aec4230c0535cbdf84832e154b948b0317f22ed607305ecffcc28. 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/BKSAI2400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c929c7cb26dd792cb17a28a421506c338b9b5a122d4d7e130de24dbfb6e784a. 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/BKSAI2400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dfde1b03cf77c8db156b46fcd2c743b5ddc4d220d03931de776b7bfa3609fc. 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/BKSAI2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d372f6add4571d9b411ed92667bd0488d330c879453dece505e1e127e359190. 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/BKSAI2400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297bef96f7b5eae1eed7d7a8b556ba6c0e29d32f9c63d4617376743b2fac3243. 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/BKSAI2400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf56bae4c4902e6cea6cc755a89bdb62fe39d00281113ea17cdbc992fdd2d0f. 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/BKSAI2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d80a71eac1d6e7bef4cb394a090ea71b42d6a1b80dc30331e2e58ec92b9aa00. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:15:59Z), 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/BKSAI2400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be51ec01c8a54582ab317e8eb5aa0e8a97fffc5c5e5ed8a3c019a51ad52f17c. 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/BC66P2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b67c5a0bed54704d702a07629f5d0fec8523a96128bb8cda206ff1298371c6. 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/BKSAI2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d662e2fdfc4f83912efa571687bc907ec177d05179648a1967790436a725d1. 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/BKSAI2500055.