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 0x1d2d7787c1f780775b53c6c5d5afd25665ee93f4854961966fe059de826f534c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69d6af67-ea57-4906-9de9-faa573bdbfd1.json and https://artists.proofprofile.net/proofs/artist/69d6af67-ea57-4906-9de9-faa573bdbfd1.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 0x94c681cd5fbf950bba183d898d1a9bd9c89973fc1508126666d616a7c7f3dd69. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEQ2407527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb424c8e186648a304661c3fca9dd632e3c108299cda7647b4426e77e7e5564c7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAW2474069.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605e6ed434b3e31b9d28395d96ccadab97d27821f1c13560be7d3f1e7d8b2dec. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAW2474070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215315499ddc17282d3f37a8102ee9a467c8afe379c21f1f26bccec86fae1ad6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAW2474076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e900a386e2598073148137151a92a3c83eeabc8a3abeb0a033f3beccbcae5b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAW2474079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c258ebdda608838112f1852fe75114822177666a331e77c2405f6026dc252d1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:45:16Z), 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/QZTAW2474083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451443a6973b2e3f4409507eb8b37f4a7f0d1e759f73293863f1fe509efb3f1c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN82558198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740009de03a76f4c0cc8a813c86a3ef1a85dc3633f35b4fba93cd8a40b5696f8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6Q2534758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6539a516321ea527d0095b88807e486694f34a47cbd1befd4d2e5cc738da45e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6Q2534759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f05ca9b105de9158f51a1f2e5190774f87212efd94c29f1f3e57a4ff805372. 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/QZK6Q2534760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55d671b9821b8f3b0d5d5150b7497fcedc06581daa1c7c92c3286dc935ba065. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2534761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686df874f46565c256cafdf19963038542ad6781f7a85248475310e210cc1d32. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:46:21Z), 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/QZK6Q2534762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646633d356766b3f0e31cbdf0d54cf278f0d23380c48217b292d512e312e6322. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:23Z), 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/QZK6Q2534763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90457362e3dc29d4a6bef8c3c4b14bfa7cbbd0c0af2d7e951dd0db4ecf246556. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6Q2534764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572cbe649d8cdc016d8c4c808367126713d5c656282d5307bb3106450f8360bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6Q2534766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb02ffac33c9e1f679173078cd41d5f933ca8c76e17968c4a255f4510862e3. 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/QZK6Q2534771.