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 0xb6e006ab4224dcbd381b9b1803aecd217f29f79b91ab3a8d14b3730d7cecbe07. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8658d5b-eba6-49ab-973c-bc51996f0fae.json and https://artists.proofprofile.net/proofs/artist/e8658d5b-eba6-49ab-973c-bc51996f0fae.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 0xc43cfed5c295475ad22118c6e0f9f33783c6ecf761bab39daa08b4ef6b3f179e. 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/MYLR10830373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf4989782e1cff545230e6fc481262a94b56dfaf372d3f623341a037da00026. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/MYLR11430272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434db13bd339dfcc1fadae5ee1cd5add7f6819f5bc53f977e7e8bba42495b628. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/MYLR11330621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9010fd102b550003517bf10cf790172281afe974a260f74bf0b351301f694ec. 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/MYLR11330063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a865fc30cb7f122350a0b25c6a29a4e00769910c64638c2cd8a3be10261bd5. 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/MYLR10830567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79957876ceaa620568a4c021648ddb27076dc9f6b70ec08d2fc1836b22b3c0dc. 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/MYLR10830566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c42899bc1f344d62c8ebd20cad2696cbba9b717c29c37e2ea1e5d273994a0f. 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/MYLR10830564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b44606e572f723283f73d8262c7f799daf30d33d8a659d436393e2d012a68. 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/MYLR11330325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1560388813e763ab093da8146b6aaf6c650762607c1f46f9ebf2d5a7c724b87. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MYLR11230039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74511cf2ca62af4c2f2f3fac4ab5d14e3de1a831ab2618737478007af51f7f5f. 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/MYLR10830565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd712a3f3dda3658c3d0ed1da2d1b3d530bf8873284fa792656c55ce72e27b11. 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/MYLR11330062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2c1c3c08abc34ddc86b0b864209bbf046f6f95d2e2b21d4c5927cc0905a083. 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/MYLR10830568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec93523af0d6e1611c090baa431c9a1f139f729d60542f6a57f00f90b9a96e9. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/MYLR10830119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44095eee67474793b28b564ae8042e36b5c4f7d371a7fa45fb8a9ecd8ba2942. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/MYLR10830385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b4c66c87f32ca91e791172c37309a26271f14966eee30e8e1017a7c0dfd6f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MYLR10830703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629698ac4e244c506380b2a35b404319a246e75745f7a6374b0b0a88b0419dc1. 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/MYLR10830739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd1ecfad32966e6be18361d12a5df5979e469f48f233d72e96751c95377bb43. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/MYLR11230000.