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 0x8b7a9fa0976de4d87acd7d67313fbab5ccb2cb983ca961209035e0324eec0156. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f44afc9-1124-456a-abaf-82fbc5bcab88.json and https://artists.proofprofile.net/proofs/artist/5f44afc9-1124-456a-abaf-82fbc5bcab88.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 0x724727c7c87cda302c94d084946a6ce9966b1a8bd65a5d04bf4eaf92677a98a1. 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/DEZC62497958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8970792b24b418248b044c286584f23d944c0fb41793551bad7e05cfd73e9d74. 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/DEZC62035375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df5558ba352b021992a6abed4144902d9c012c3d30af6fede4ef14fe89e959. 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/GBLPF6779932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a92fc87d5892fbead29728065f67ea7b2e587e644131215a76da3cdfa426b. 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/GBLPF6779733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eebac121b6a0fadcb95988d8ebd3eabfb1da459d202806a5982512b2be1d148. 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/GBLPF6779933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b2e92442d8118f860bad21d6162da84649b70b193fc96be9eda695027b370f. 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/GBLPF6779934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5590b990bd5bba7c3fa0f1bd6b3af008c0f5673923d97ead263fc98800e45d55. 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/GBLPF6779935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc49d3bcbaa3d727428e40a3b638fbc617ab76b73c827fb429bf1cd932d8d43. 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/GBLPF6779936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c78fe6cf3e0c7c0a9d97fb16d388d1c39913f208ed2755bce5efb7e5d3880f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62419408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d451b8d38d2fe0ea692ec28857e3a7475c65359ee48079390fa64ff023e38. 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/DEZC62419411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c2751472d87a1e31d0ffc6417e17e71a68ce3f6e2088a241fb348f0ad7810f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62197584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1e9c61093af7fd18412ef622a8695da63c4528de9609feb495d8e304ac202a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEZC62197583.
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 0x1295d6d9537b4ecd31b2139bc35e80ea3aeb64143d0b14a441f5205d38e52b45. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEZC62197587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23530778a4c7e01ff16a523107beefb0fe54ffd921f0fd6155936e63740efa71. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEZC62197588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc0d47b989f23a98c4bc9aa052ee145e048529ddfc2d66f73d9deb6e1826a6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEZC62197590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47f20cd39bfbe6fc169ec846d1e077cc2011d54b248eb31c1876b4ba477995. 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/GBLPF6795696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f0ab43177de9d8788166390f6500eeadda5456faa03f7c79e3a75041e3bd01. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6798056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a812f11679261ab2d188603777f6cff21b3650c8619dc8d1477895bd7c4a132. 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/GBLPF6779397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade4d8ce2d24296a10245eab85ff8cd1c42af00946c89ae95d6fc1743e37852d. 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/GBLPF6756225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1d41cb5ab468ddba545b9ab52432091b187c68205845b23a7cab32d4ead99. 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/GBLPF6754654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeafc4e9f93b082f66e0bd616d349181c927fa951b47375e26c06b179d590aa4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62286197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d938a3076d9374bc7f94faa71eea89110669474a105027354b5258b062c3ba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62012174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311756d3742148238b2b30cf4ff90d09145dd68ecaeaf52f782f9786aa4154d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62464987.