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 0x007b8cadbe8d95af8b4647da8d6ec7a6b42859ad7838064e62426c5ef6231d7c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d19ba43-39c6-4db0-bab8-6e6d295a76ec.json and https://artists.proofprofile.net/proofs/artist/6d19ba43-39c6-4db0-bab8-6e6d295a76ec.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 0x4000821dc759333cd4ae7eb793110037ae1acc0485ea671085a21438ed7d7032. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTRX2456224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590085fa459ff0555b761197d25a1655b58d5043e5c8f15284a82e04ae90feb8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTRX2456233.
Whispers in the Night (slowed + reverbed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55faea94cfa0022f2bd6a1759c0edb63a9ee848fb9dd31204d1febfa7075237. 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/QZPEW2453979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae50b29597b3deeed90d85469b08dbfdd51efa63243ef7454fd97d85b6e310d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ8A2479204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9572e3936b56d131ba38bec1ccdd83703eb1bcabf8ba01336906b4d001c9cb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZZEB2400886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50800789d1803c1c36274ed8d5b74186ad5c9ec0faa77e96365004ffe7287e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN42548269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c30a32588514ad09291c4cc85c56b7cbd4967bb24fb5f2eaf8009e2b5e7c953. 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/QZHN32548450.
Hopeless in the Darkness (Slowed+Reverb)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709ee6c5940c1a95016317fca67dc5a5f51eca57ae0cc331c3c410f8d3750aee. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHN72580861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60163e4ea109b147be9b101bf5a5ef8911873a213b25888d6d060d58c0ad390b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN72580862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d5a5b495e7d8785e83329fe19e1f7ee78d346c21dce173ef254bc1de4a0317. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHN72580863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade579dbc590230d219efd724c2616d4fe604de1cd2280936779146dd4d19d8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN72580864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cad970ccbf45262a5aba213d9e81edcf40aa1d3d9e2888405d6344eb7c0976. 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/QZHN72580865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d187fb8d5fda7f87401814e74929ec39917327495b1a62e8197975dcf00c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN72580867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7042126db86d11ed5fbd8eb13cb7e7f4b2e42f51b22ece33b13c0f43bb539f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN72580869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1acaf5c68c1ad15bb7b25170591a56580f08916fa703a9570a5feabe9ec6a3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHN72580870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fe902fa5e1711980819b3e6e330ef4e318de88e54ebaddfd76a20ae0ae7fca. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN42539787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50800789d1803c1c36274ed8d5b74186ad5c9ec0faa77e96365004ffe7287e5. 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/QZHN42548269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c4bc1c78d9cc4bc3458df1e657727b174a6e65761c69abfafc943ecd73cb4d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZK6M2525477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4145469a9a62c510c7b0d479e3c2fee37606aa8dcba49a957f4ef97c7a69624d. 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/QZK6M2525479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e24263170172f3e09b64818b86fe3471469423c632c2350ece6114aac090df. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZTB72559103.