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 0x8cfc684f70145e70d48da13ba1b23a8b427ae3187a6fb1176fd11b7c349f0039. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3425441-1cf5-47ee-8736-26eca66d3e44.json and https://artists.proofprofile.net/proofs/artist/e3425441-1cf5-47ee-8736-26eca66d3e44.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 0x43d7b1447760fffa7e3d191f5d5deeba9f4e282355e42980bd19815e882ab388. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/HUB741322214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa1ba0767b1c477a600d57ff91c52919b0946552f656c3051d833a488341fe. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/HUB741322217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702abcfadcd66e1dd90c3632851e81f2b8624656f4ef6f1dfb13ddf573cd6945. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/HUB741322211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c76449256670140a49e88eb5711068e506b847102563097486754c763eac74. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:34Z), 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/HUB741650209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ec011ff9d1557e14adc3ec91c5483121c8d14aa21a37c77175afef27ecc437. 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/HUB741650210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0e234c38c1b34496fb858ffe59316ed8202c80bd3a7f4034112b2ba5aba56c. 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/HUB741538202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d28e7c6387a5ccccf00adbc5b89b12e592e7eaa8f12335b62a52b18acd9e1. 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/HUB741650213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5604ad32af602d68eacf15c9bbdfbb9741a3ebedb24881b31d724b019c99d9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HUB741650216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31090d389542067f1dcfcbda62fe93e8c0235f22727d89bc0cbd22063baf4957. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HUB741868203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf419a61fd378020595c99d9f195ebe872e1d101fba6466b098d377468e6d47c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:19Z), 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/HUB741975202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96142ac752724223f4e3fa031ec173e7af5bdbedcb819bcf9a549b27abfaa8. 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/HUB742079203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17080f79079a145ceec097d302df89dc36c52aaf750a999dd6e02d718a0962f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/HUB742279201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4b95560d19241454a97ee18e537afce1e1ee5239c5a0cddea5bbf21a43e3c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:02Z), 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/HUB742279202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265c4e7df3019c17e0db1211ae3a00d91fd68b002ac2b97ca1c5e101396bcbb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUB742279204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91598ece028f517c0caa7f55f49f4f530f30d38e735d3cc53d4bde42b1a92a55. 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/HUB742079202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c2f48a30c2f615446b47832137f81321efa9128c409bb25c51a4309b2de19. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/HUB742279206.