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 0x8303e8814a49ba2aa18e8dddc9831168b689ccc4a259a50c25e9cda2f73b187e. 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/e78ee1c2-0456-49be-8b30-7511968950ad.json and https://artists.proofprofile.net/proofs/artist/e78ee1c2-0456-49be-8b30-7511968950ad.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 0x6141c484cdeccbbeabdebf3b9b3bf0fdc3f2970c14dc87552fc42b41ef6c8d24. 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/BK4DA2324381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f74e3bc38baa58109f34782cdf5bfdaed9e18de060e3e20081c235bd5d847. 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/USEWG2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303af221dcf171df658d17dee8a7bf23ce1662b347bdaaca84f3168c711e8e1e. 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/AUMEV2351777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ee1826adde3e1b34b0d22e990fe42dafd8bdf46628c03491dc1fa70414457a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZES62365526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670b57b33b51e7d9bff11183cd32b1ca1b0cdcc003311a4a22dbce3e2b980c9e. 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/QZW9N2219394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d986fd8531821d96b2a6ea499e628b408f98353b0bb002e9bf2ad88bf9ef46b. 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/QZWDD2278722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe607d113a821e7fd4dc444399b043501f80722f9db80da8b8e4e21f08f4fdeba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJY2247999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b24a43e42da535c0e4dfa5299ef8ecfc38cdb6a5bd0f45c03126d41fd538bcc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHZ32215722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c9dc98b8f8c7dcfe5d6c73241d82f37cf8e14ea4258af8923adb433e37fb04. 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/GBWUL2228851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8623104353f66d99230f42cf1b600e377fc03247b12ca23875753f18964909. 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/GBWUL2212519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95aadb9725494ec7a873c4c220d3cd6c636a063a26bab5990422ffbd7827c3a. 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/GBRKQ2210352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b24a43e42da535c0e4dfa5299ef8ecfc38cdb6a5bd0f45c03126d41fd538bcc. 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/QZHZ32215722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6267aa0e378121ea1141108d5b969ef195ab838f328fd1237da32af66561d72c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TW2227363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575d97648addedf42a8acaf828a1e2ad63a79737af9e7b2c2c12ffa9b446eace. 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/QZ5FN2595915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdab1d787dc83edec8494e9439d343ba2173cf2b86fdd53aae7d8f18a5d8736e. 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/QM8DG2413041.