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 0xf736c1dd5e767b3b854a046e20c9c3387bbb5d49e9a1c1f2545ba48646faa84f. 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/f00bbee0-74e1-48f3-9c67-c38077344c2a.json and https://artists.proofprofile.net/proofs/artist/f00bbee0-74e1-48f3-9c67-c38077344c2a.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 0xd40fcf25f8b705b94bdb2022d128b33ee2de7968d92c7de3a6395e19f997f68d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZFZ42189712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd456ef346cdeee739dd293a65547f7e730fa03f7f3a747ece323808e59f3a06. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZFZ42189713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb347ee5cbc3f86d0cbf0277d723359cbd99a9efaf4de084b8be23327a5e112. 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/QZFZ42189718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa403de0c2158e9f7467f9c17ab47edb3b9f3f44e38cf8eba7f20a9fc2a770e3a. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:28:49Z), 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/QZFZ42189759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83132dbf695f55dc393b5b092e687c99f4dc17a396956ea765e8b4cfece3082e. 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/QZFZ42189760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59be92945b91623a39e33e47a091cf4a20628513bfedb3ac895945d864137a05. 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/QZFZ42189761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e335bb07149ab239147b7ed156eedcc9d1f9358c4a622eaaccae5adc1938eb. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFZ42187860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113c4c8c4d923517bc0d16ddd8d1d55b082207ff1d3db61b8d3c23b29569a2cc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:05:04Z), 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/QZFZ42187861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5ca2f411e842edc53497cf2caa97a60d2d85ea5f14e055ecc1e7c214119ee. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:45:53Z), 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/QZFZ42187863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32de0d176a54428d5d773d1697c610175bf4b84003b0be5838458735afc56bd2. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZFZ42187866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7270f3254680734fe81c98b53cd3f845355c75e24c5bac0689fc7b35d43f26. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ42187870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9b8f589b327308d245d6a163c57d9cd8c25e1768dcfe6fd5f5312cb7e53fb. 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/QZK6F2136481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d31d65f232a871fd67310d4100cb84ebfe1b73ba23e3d372c124abf48c67e10. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6F2136482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa287f9d0245825776a4f8cd5f697a77a8f7d7fa8e8c1554ef04907e35039dc37. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAW2347928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780108823c213afe08a7fcd1045b4f21f18c32ea6a25e0be3af3145d5dd01548. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAW2347929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948c0883aa10f8c56f1a47a04d5a276bb47d51ee43e4d925312cbd37350040b8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTAW2347930.