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 0x64c1922f7a85addb6bc0b2f3b3adf9ce37cf10b0ad3783cee424ea4f732acc21. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/effd2f5d-67ac-4b30-8ab4-5534efd47a8f.json and https://artists.proofprofile.net/proofs/artist/effd2f5d-67ac-4b30-8ab4-5534efd47a8f.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 0xd73b5e195e62b3b23e99b13670913fcd920ecc94bc93a62b4e6a46ac16aa6144. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2511677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1920143677f56c5231e7cefe88309b273007479240a528d9b29ff1f5091391b4. 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/SE5BU2570574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be817282a3f146e6cb23d7c7cc5ff12e6717374f0249aad7b05ab171225a65. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/SE5BU2570575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f07893a2b22c36f9a8f929711a2763885d1bf11c3916c50e1971bb2f913f288. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SE5BU2570576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35f50d5eeabfd38f2446d7fdba824266775028b68feb94a6dfc8dff7268c3aa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:25Z), 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/SE5BU2570577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b39acf4a2a841dda7037293fbe0b7f63d63f4558a1f0b68af02fb3db4fd9c74. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5BU2570581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4b60d73f6b34b9ea06f26e01e433d69dfc100f3909c99f527645767b069e79. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE6XY2567590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df9e20567efeffdb54b1084a231d6da97e4a6fc3b8b3c21e47879c6717886c6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6XY2567591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d88b9befdcc33290a78a1174e12a0063a0d7f04011b7ecfa9a670649f9e152. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6XY2567592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853a420dbc9bc3b701a52a1c4ad6f0f0f69fb615e88f06fbaba6b301e8acc402. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:49:41Z), 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/SE6XY2567593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd54dddc99087fcfe64ee20c5f0ad677b263a6ba7f3a8bfd7acc1eb06cc4f25. 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/SE6XY2567594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73b5e195e62b3b23e99b13670913fcd920ecc94bc93a62b4e6a46ac16aa6144. 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/SE5BU2511677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87817e9c863f99401b0fd646862e1e3e0c1080b6e150b064ebeb527e71c4137d. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/SE6XY2567595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef967a6d4a84da04510e496f4c3821d3aecece21e0f2a9850888c7e9c456803. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:50:27Z), 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/SE6XY2567596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea0b479464e4f945fb5085b85c3b41ab2604451c25c73a5edadbe646ba88bb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:06:28Z), 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/SE6XY2567597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8678eebf6bb2ada53402db22672d934a54439e606cc9eda48a82fd76f1ca16. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6XY2567598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eafe20dc5b39f0eecc6cf77d5e78723dd5df8b30f845fbf35ee79f0277250a0. 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/SE6QE2426116.