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 0x44e41e3c4f3970df6d3901142bf8b789ccafa6ec6958c53d5695d878a4a52e9d. 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/c1d448d5-b0d9-436c-9554-467246705102.json and https://artists.proofprofile.net/proofs/artist/c1d448d5-b0d9-436c-9554-467246705102.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 0x2a2ee2fb8a4c63bc2cb2d56cf69cb0ba925ef7c01e49c9e387402514e6fdefaf. 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/DKADG2200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae12ebc1a73cb99a5a8a30ff64ab8c5c60b487251c72bcf9eb2a81df0aeac38. 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/DKUM72100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cec3da7f2770ddda8d7867c050508ff7cc6483a1735a2b8597e63ec807e586. 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/DK4YA1629002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a40c2c61d4836629582e0710cca00e4603123cfa9b9521e99a709da906a9b88. 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/DKADG2101095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb9d927468f4188c4db4d55789b6afe9370ca57fadd1d4b56a321bd8dad595. 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/DKADG2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0caa7345b43ea06e3583a62fc097fcb30f476e84f4e2b7ce6d5372081ebb6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DKADG2000730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a420886b547b528f6c1339cfe19fc67df13a8e552e711b577a16ccb2fa30c. 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/DKADG2001042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0caa7345b43ea06e3583a62fc097fcb30f476e84f4e2b7ce6d5372081ebb6. 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/DKADG2000730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71fde2b3f86d8ffaefbb2deca19b04daa9fe7cf38da8964ef406db64856607. 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/DKADG1900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261958009aa2079d5b9b45304dd9a3fc3ac053ad3b3a6dcf29492437b4b804b6. 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/DKADG1700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261958009aa2079d5b9b45304dd9a3fc3ac053ad3b3a6dcf29492437b4b804b6. 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/DKADG1700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b7cf2c79f287298e39f7b10d8a523a13a918b3f56c4c5ad83e0539886616cb. 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/DKAZA2000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d035c207a01d19d24ecf45cefdceb062b3a6cd14f1beefe8ebb53eff71aeab. 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/DKADG1800862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da09c81d9c303e70dc528a95c07f326b5c38ca5e205955c3839f3cb39b5d2ca. 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/QMFME2332020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9f92d8ae45eb0e51476f772fd8c3c1817a5e55f04c2d51fa76e348c32df281. 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/DKADG2000451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c2436c0aa882b7bcdbdc62ac3522e13eb9d76e3c8b26a2a67e248dd7997ce4. 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/DK92A1402417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc221d9b3451f83803382f1980e95b1a32667a4016e6f0de9470da2e78c23abb4. 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/DKADG2000992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc221d9b3451f83803382f1980e95b1a32667a4016e6f0de9470da2e78c23abb4. 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/DKADG2000992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78429a1627cb78c1d32cd43087f194dd476e7389c322132c4e2ba89c4f4b3251. 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/DKAZA2000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db3bbe2b53be34d3220192c1fa40d121c6fb528ed17143ccabda1214db4b68. 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/US38Y2507989.