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 0x178de936a9d4a04cc64de08d79ece0523dcd0e195230cbe6c8b461a72618a00e. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22dda8ec-42ae-4e38-b6a2-f96658d58936.json and https://artists.proofprofile.net/proofs/artist/22dda8ec-42ae-4e38-b6a2-f96658d58936.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 0xc71813b737c417862c30821a6ec23075e47ef21cac1342827e9884b69ecf3070. 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/TWC010102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5886480869fba590c83ad3e450f5cd1162030441f06cd5e271cb04b3f8f375. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWC010102320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5886480869fba590c83ad3e450f5cd1162030441f06cd5e271cb04b3f8f375. 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/TWC010102320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2343ec752902968fff755d62cc83338e76355c29b49312006038be6ff1836665. 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/TWC010102340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204fc90c51cced5792bb7e7871ad9c57bb3ffd9714cc1c9f2c957a2facacfb33. 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/TWC010102380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72152f2d0b98c7ece78ddd812553ec6ea5d6db51c93534d6ec8f2121a2f8ccfa. 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/TWC010102390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513b5697c74ffc0913d079021487ba99aa709a676681582660287c1ae9db8da. 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/TWC010102400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18005b9dd7f9c0e0c08fc7a5a0198f2fd772880c5d618b47855caf2cdecff80e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWCC37001406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fa6060754812c1c1fa862249d09c55a5964cf7128c309dcb47e20023f70759. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWCC37001408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51b67280b70c2b97b895dd717e93ffd90efff27c8a85e0adda8f50c23a1e2b. 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/TWCC37001409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d74d05e0825f10ca0319b4d3d25522bf9f22f8a4231174622423ef0935fd7. 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/TWCC37001465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc6b71b8b2ebec66318a261655f7288502e4e31378464eb405837b1862bd41c. 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/TWCC37000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b63fbcd4931fb8490657588d8c1b67b304eaabf5d01dd65c3130b5ad63080e. 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/TWCC37000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d14eb0c63470e3003feee48a3f13b11d94edecc432718b6c5decc18476060ab. 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/TWCC37000247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382c1e679ca34152ea420b8ad457719c159097467e1eff14c86cfcce833e7a21. 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/TWCC37000245.
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 0x96b99295c354648c121b5a4b18480a24f1e6a441dabfae322021a0d241b1aefd. 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/TWCC37000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471125617d6c8e0bca9b00af86fb7368e766d6683a8cd02ac93e56463b8940d2. 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/TWCC37000342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d9d063adce15758523464f4d4e601000b7240110da5aaa3e2e569018a94636. 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/TWCC37000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01660a5bd50e6d6262ba74b652b7eacd4d4f521948d59e62ec7c4a5f498211e1. 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/TWCC37001420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257edfa8444b81f55a6381958a7818ed3401ea6694ad9869b405975af1e3a546. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWAN77500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98779441503a5bdf05b386fe773b730c286684b7261c1b0e8e07bdc12eea25db. 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/TWAN77500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df57dfc1ab406f339cefdb035687bcd7f503c1f5ac24531df9adce537928012. 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/TWAN77500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13551768ea07a76e9af7e91d7b3b4c3fabb50cbbbe5be7ba3ec9f33d8d63cd0. 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/TWAN77500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85f908e0529e0cbacb8119bdc967b3b7cc208d04bdfcd78d0b267b9bc2ff318. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWAN77500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c742979b2c5fca1694a204e1bac54cb324b1507041db31031d5ce85f04bd0b3. 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/TWAN77500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e388e0095109281cf7d8812bc6eebfc1e501d1db476fdf25be38d5d3e40cb5f. 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/TWAN77500054.