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 0x558af7e38578aeb3d40ab52420460318bb25a2d5efb8a92563bd93249463b951. 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/0e120f0a-f5b4-40d7-b79f-cad26992bf22.json and https://artists.proofprofile.net/proofs/artist/0e120f0a-f5b4-40d7-b79f-cad26992bf22.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 0xb1297cc1914ad8a107e3a52d86b15bada6b4f1c4d2df297697496a39eef4644a. 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/QZDQH2393242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa73da3e4f76a630488bbeca35c0ad6f95a90cc244d47f7bbf93dc0d00aecde2. 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/QZDQH2390835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d919e69e5c75015b54be6c0c53a3ece5576777fcecb2115de59b2d5399c07. 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/DGA052374427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f3a01edaa8c05edc6a8d3b880f257f2e726e2e358cf1c70d97cb76feb0e2c. 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/QZDQH2366034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dc08bc5a96865949401328b739b0704c14dd329f70bd63b00e2b8d8b1f7b5e. 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/USANG2219051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c0e151c12c33047533707221df908fcae33a2a86c50a6ff67e0a94dc7ee11. 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/QZDQH2385012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7090f6b0db0f81b7f4b4d358af9239b6e8863be3d41d380efec3476e8f1bfcb. 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/USUM72315925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6da27ab2fc5a678eaf2c3464e496700bc08a1ffbd9ed3268107170f343fc5a3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTRX2408319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae06f58aa50330b62b92d58f8ddfd3e11ae34fa1f44a60870dde31ef7b77a9c. 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/QZDQH2389586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee09c693c6a653d1b5e978ed2bd4e0cebba7607be3703f20003bfd56610c7b2b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDQH2421240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34316603f9c45b7ab9c3a0a9b477daa5bfd96f689cba024afcc3362c91bd9059. 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/FRX452480244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f352ee829e777fa3a31c8ada3f7d222f4314dd5107f65381ae09617532dc8a. 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/QZDQH2399769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46307d5af551b6c1bac3df621e0a7f16114b1344b665ce7cb2259c5b4ec69fca. 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/QZDQH2378717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf1bb42857feed32bbcdaa3776dd6d70723c17bd6e200166ecbd1aff77c6ba8. 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/QZDQH2370225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846136fb4ffa35eccf93efde1c65a75ceef1f3988d2e7f264be842d8e38d1be2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDQH2434040.