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 0x53b713254abbf7b0be3c32cc3802eb7949bae1dc299b1a3bacc9867354c9cc1a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35cafc9c-f94a-4f7e-aaf9-f39f878892ae.json and https://artists.proofprofile.net/proofs/artist/35cafc9c-f94a-4f7e-aaf9-f39f878892ae.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 0x1d9c0151e3281b5810f48609e944943ae3827db9c5ec1c01d8e862083584fc18. 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/QZNWX2204832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec3d8fab72a106127090e221d98a8c3015051cf25bab1bd546f02ed732451e2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZNWX2204827.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63de5b8061796e42799b4cb985ffd224fc3e497aa4f3a48f313589457e98c67. 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/QZHNC2044922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d6370a862f5de3a1b804121e85eb91a5589d8a9acb2cd80af745623e4f7024. 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/QZHNC2044928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d135c5d373e5b774e7075ebae1deec974028f4e12e99bc54c3a163178027c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHNC2044923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6717c22c81d4d287ebd1ccb62db0cdcdc058fe97ae931f75e4420c0f0b265bd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHNC2044924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5108654061909e36c0c84a285ebeb32f885b3b5070b3083bcf2bce10fa2ca171. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHNC2044925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef8e5d38eb24211447c0bae6d59373bb432ca16ede2edd66c72e94eaf779820. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHNC2044926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0f15fcc2ef6f3fa73d924c27dd9e15e8674ffe45dfbaf6841c3a7162b51276. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHNC2044929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb154eed2d4fccb3ddfc7b56e09ef99b00ca34beae29f86a72035a36ef8123a52. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2044940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf0fd1a9c82273db014812e3573ce3b84ee5702087a9f6bec7a5afb24640f5a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2044942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe167b5f8fd9bea9296b9ea49fc0956d84e221a0594bcb59577a729fb5d71f5a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNC2044944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f54a1bd9e3deeb1ddbe5d71fd4e0a429dc8078dfdeb162c3bcc8881f53f7b28. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHNC2044939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f0d6ddadd0e2b57139749dcb41eb9436e9a848b5259d585285f0c0e169ab10. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNC2042994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b8943da098949b8c80e13c51aceac713406486448f5b97745af7372b2ca4c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2042997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679d75cc26181be1fbd8ca8479504805399237eed883dd5203e1004a1146ef9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHNC2042990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f949be9153194f49d5fcf50a9a016e253c963922f53ee95b83c42c78705380. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHNC2042993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0858063e2bae2c2173fa1a7aa7eff7055fe9b74ce7ceb768943b46c82de286e. 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/QZNWX2231972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4796917ebcb5bbe7855b45334907fd6922b0d2bdd88848d7bbe4127dd866e20a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWX2231973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0aaf531f89de2f20e9004066b20046214545deb10ebfa485b9eb72d891e4d. 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/QZNWX2231976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b24deb729722af45eb17afd5aa9d9b888492d0d195f7aa9b7b48f1b208639f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWX2231977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a49ab9bfe46ee1b588c16846722cee98957e6c9a7722994aa3a87510037ecf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWX2231971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a9bee11fd636fddf991918830c2e91dac74fe510bfcde622fcb4c85fbfd69. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWX2231974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10318b37a8046be63aa7c64ddac4777ffb419a58a0ef817477fd365b102911c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZNWX2231975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7ee0aea41e27940a43e6ec83bb65613a66d3c06cdd966148bcb8129fee7cc9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2043047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be11f6b445d40c2f41772efa4098745c2670a214e75f4c64cde337c9dfc2955. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZHNC2043049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d3041b49474b4e98871f177c5d4d3819c7da20a3789cadbf852a556306b37. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHNC2043050.