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 0x24cc90879cdac80cd28980bf0d2be1b3fde533d08a4c44d5b1e279d42d1d878a. 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/b593bdf2-9bc7-4836-a961-9fce5bc0fb96.json and https://artists.proofprofile.net/proofs/artist/b593bdf2-9bc7-4836-a961-9fce5bc0fb96.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 0x6d33e3b6639b43a8b4cd7e8535c16547f1b5afcbc0e7dea232772805590b933e. 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/QZTB52426315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e9e6432303c795c4e9863685562053a8826ea17bba59efb1de2421796bafbb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB52426316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760e7cbf6893ee8df5fd496e1416838d01e313b3fa17db9d8b7d5942075de1bc. 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/QZTAT2416062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0139507294ba01ef9be1df221285756883813ccb702145520c1d3baa696f2c6. 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/QZTAT2416063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6358f4e1160b2318d2b54769b3001ed30c7196e1adfffbc2a7fb32c64c896d34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAT2416064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df5c8af09477fe450ca4f0b0d16606963bb50eff74441d9f0cfe4bb3efad1a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAT2416065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d5c59ee2c5caa3d78e4d2cd578dcf35bc9f6ae084bd294922aee24a253fd1. 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/QZTAT2416066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31823537df3fe1583224a8e2d652e3408d30476408d919b7c9474b3b218636e8. 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/QZK6Q2406316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22707913f3e96c93374a59c311fe454ee4b02b0b16fe035ecf0480250584538. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES72461740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6284a9deed887cf7a70613e78d1fb4220391b00597ce4bfe8f9d234db2f49710. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ42441264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9019c4d64e26e4f2634197fa1684f081b59bb84af25aafbb47ba34c817c166. 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/QZWFL2320652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa3d2284f7f0fbc80be6b2b33e73324a615dba1e82ef5462937b16dd980c455. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBD2398425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91fed0dbcb1ce40ef243cecf2bc4633878049610ddadc781bf876ba6522b9cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB22311777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e0bd8f0cf8d53092cc69bb0e39eac766d860a8d436c4e9c96af1fb79fbe682. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2330840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31c3051ca2713efa51bfdfe646db572bbc79f59d7c255d73d32621c078ed430. 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/QZPLS2394057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92b28a6c96110b43ab91893a362c00a14e0aac9286a2be9b94dac1888b49354. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP42541063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a7f717dd2f561aaffd1d17a83813aa8d3a9a63b1928b1acb31bc8a7bbd096c. 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/QZHN92507935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14d99b71007692c3f8d1e011c9eea67c8b437deb418183f269aa6385ccfabb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA72581744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f367cb14751573d48cdac650fcd306e24d43f07e5e7dbc19bbe9f0b7de863b8. 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/QZZ7S2480155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2533ac9e81ed8bd88a4fe4568aef6e90523ebfaf3c0301ff813a8bd920b0be. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ7S2480156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9082b2dd2822adf2f6f40da4622e215da865992276a4304abe7bb8407d2f197. 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/QZZ7S2480157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a4b4e7eb55de361ec825f6ec29316f5cfd5e9e8537e14cb2b332131b5e8afe. 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/QZZ7S2480158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1528974158ae7ca38979799d558c61db0c7417cda962189420d30230d9f2d4e6. 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/QZZ7S2480159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7a6f5595b96aa48a6a387cdbb17a780e394546a00d4bd37c0dfaebb6186d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ792411341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22707913f3e96c93374a59c311fe454ee4b02b0b16fe035ecf0480250584538. 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/QZES72461740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6284a9deed887cf7a70613e78d1fb4220391b00597ce4bfe8f9d234db2f49710. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ42441264.