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 0xf89d599a0ab1ef00732c3101a35aac2dd4fe04cd95a32d859ee0cde98a4cd117. 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/dd7dcd8e-931b-41b9-a39d-30b3cba08bb2.json and https://artists.proofprofile.net/proofs/artist/dd7dcd8e-931b-41b9-a39d-30b3cba08bb2.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 0x5dd4acd410e733f73e52a1233a4f6e580b41e6411aaf427056332556ccc20f20. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRX620419010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542cb755867aa36644e77fb49d36f2ae6b239d14768675d2abf3880b8e958f91. 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/FRX620419040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786b6559c4e5801268829510a79981eff214481e90e98a91fb8d287124e454f0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX620419050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b70ff1298bfb1524ddc8f317d540527c40558aa453ea082052ccc75444001a. 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/FRX620419070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c719a7f71a2b2b91d1dbff9567aa36b9f7faa6dbd4b0fa0eaa2feb97dca5856. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:12:08Z), 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/FRX620419080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04422c5f62c325802a1da3a42a40fd06a88cdf695c12e3a98f02fac945d1f8b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX620901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4fb16a97edf22f090382bb488ccf8076bd7b8fb2734eb8c49ed3f44c127882. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX620901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8208555f692793d460b3cc8db9e6cd2bf35adcc2300f70b0f78ef858506bd5de. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX620901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aebcb8787b07e1518b22da128ba85a86fe5751b24b792214c95eb0eb84b1d1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX620901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8379480f2e18b06f799e1ba8d7cd038e918b7e27dbfb32c6aa2822b16fbaf5. 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/CVA101500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe858b7d6c19911995aacabd504ab171f62e5818e394e03b265ee33b427fcb33. 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/CVA101500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8321d88cd373054713f29bc4080b83690f4b58f43f894bbfba16f094022460. 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/CVA101500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce114f25a55e89efe95220d612a6c730556ddbef3983aadd672e49a0c0cfc5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:08:57Z), 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/USCGH1816278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845c4ad9a25c71c5bf79f5e978c02d3da5bafd2336e9ee26f93d931fab794a89. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:37Z), 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/USCGH1816280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5f545ba6162f14a50c654e4c13d2540d97fc31551e1bcdc877ff0f649f42d3. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USCGH1816283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc69937306f325805165db01af2f0dbc71e8b1f8c6ee5eb001e3ab9c1bdff98. 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/FRX620419100.