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 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 0x6e4119a11a348a4b37bfd4710ecf06cd6392058cdd8587f0e777d1076d1c4f75. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ffbac93-8eda-4fcf-bd4e-0f0f1d6a0ba3.json and https://artists.proofprofile.net/proofs/artist/6ffbac93-8eda-4fcf-bd4e-0f0f1d6a0ba3.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 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 0x8c96994b26e6f1e4be64ce751ffd885f33ea3e080368a534d92085bdbd2f7ea5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI9PF2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d458c84d5f8068589d03ba9c6c40edd5dc28303450a4400c0e2093bcb426cc. 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/FI9PF2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c86a1fc4e4fca575ea20d0c80e2116dae7847b4b42db801a89a2925f88d1db. 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/FI9PF2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff909fd7b0eb6f0d9f26c742dcfd256424d2b13472a965d6624c9ed898763b07. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FI9PF2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d971bfcd50faf4fc42c87765154e257cd68e10d05492ebb2e34dad2717131a8. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FI9PF2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f62ca16cf3cc6cdce16a0b3b0c62aa9f6aee4c1602f3615b0c718fc45c0fe2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI9PF2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee1f2564f91bd4169894de71fb7a14683be6e486273036de45ed227b4fe0a9e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FI9PF2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba66adea534cc3c014255a6e7adb12b3dfd6ca13b9ec0e19378d485095ac73. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FI9PF2300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbded2e0a8398483e36daa2c163e8d46fd1270ab0308391d9f2259cf3d645b54b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FI9PF2300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd528a2cc26afd6b4d729e06f2af31ff4e2b4b31018519edc85b6d970eee7f27. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FI9PF2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aa1908ae543630afd831cb7b791b6eab40d56cf4f0efbe5a8561f156f8d9d3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZ651709213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbbacf5a4fbde5d0aec66100cb0636c40814a1de3e7ff3c9c2b8fe2f18892b3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEZ651709214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79586a0d275b978c41be26580e7df3ebeae109c03be022a26f0b283a3d546d7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEZ651709215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97bc51d0670725f1530d6e2af29f7d751801e20b2c69ec96b8d640bc21689e0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZ651709216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ed1f30dc04a9ba0f91a9f0a46b3a4496e65abe27e3e291fa90269bee215fe. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZ651709217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f58ab9cc482d06c7142c85bf9eecef16ba2eb2b5d59fe79bb8cb45b287f4f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEZ651709218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e8f893a5b4940c682bd190102fe6f5c697925c162f1369c4a6ec9a1be8f75. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZ651607325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4b23126f6f5dd3a26a5a736516f2013d291b4f616bff7f6c314689767ecf7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEZ651607326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e4351e723a361083400cc718b93f19b63d9a76632b57f635ae91aaa1933c33. 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/DEZ651607327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdff3d0a2335aada851916cbaa2dcaf4e410c5bb481d31dae8878b2e6525937b. 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/DEZ651607328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb5ef35064cd85cacb2dda4be7547a4fee10d7c61523de5bcb0028fae20504b. 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/DEZ651607329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f083cbfd0720f37da0e2151278ef4ab6489297ee9d6fa2f0e4608178a4efbb1. 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/DEZ651607330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d98002973b415cd68b40c4c877a40379347cacf52b23c852e8ab39e1b7cf9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEZ651607331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb24dc543c35f3ac19d35131529a40b65bc021e65e635547259ece598a4cfa4. 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/DEZ651607332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdeeda71f9ddf819aaf9d9cd13e38f874dc0142f6f39d5248819b5e6755ac85. 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/DEZ651372936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c3e0083ddaaaf840b5992691835ab832e29022acbb27ebbf4f50d82c5cf56e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEZ651372937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0407189418d90bd67a8f83d84308a1204cc8932582252d6a268b11f1fb823055. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEZ651372938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c119c9e566aec6babfac8f5ffb9ffa4e0e7c75aa3159f2c8957b97d19bcbd94. 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/DEZ651372939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc49f5e3118ca7c01cf0f360de0daa7a11dbdfd62f247261c88ac174715f38d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEZ651372940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dbef4429a30a9ff818918537ad59055ff8a006198f1bdcae36bc498409724e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEZ651372941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aeefb5242dfc4062361332eb6c69c4855f9223e29556f1daa232399bd30605. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEZ651372942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eac3274ae4269053870702746a79956a7f6d1676a30114640f3dc234468061. 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/DEZ651372943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f62ca16cf3cc6cdce16a0b3b0c62aa9f6aee4c1602f3615b0c718fc45c0fe2. 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/FI9PF2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc783131b02154900fbe07bc807eb96e0dae65e556af9e90924602dd35226662f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FIITA1700001.