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 0xd37af9b6fb302778bbdb22ecfcbf060b7a9719b0faa02d05652e1da26f1387c0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0ebe590-6d6b-428c-b0d5-924f7b257ed7.json and https://artists.proofprofile.net/proofs/artist/b0ebe590-6d6b-428c-b0d5-924f7b257ed7.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 0xf1b0aeaf03657f225580e8ef74d9a7f2004743be2404ad32b88caf05152d992c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAEF1926630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3fb78b8a3d5322be3327fefcc55e64fbde90b8289ee45da984967cdb772788. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:59Z), 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/TCAEF1926649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd613e87164f033c318a9aeb3b2526daf84c69f977fba88f9b8ed16982ec59876. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:15Z), 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/TCAEF1926653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0325a5ae1cee5f962d3fca17621a6fcb1a965f58c42577c0d69cf3b9b8e85b36. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAFA2027321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42941a67d46262b3d05c06c2ab2f6915be7d6eb97fe7ff49192193bb5cb52d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFA2027333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157c0cbe758890e290fc2998ee3c2e1b7411d6eced30273d3141111caccb54e9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAFA2027345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75846bb123b8ace369447f5cafb81d752edb0f59f77b78b0d60b318485e6b6a2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFA2027370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd129e21c7e5132d19fcab10df3d415607213749e306f815bebfeeedd475d3a96. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:04Z), 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/TCAGU2349140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40646521cc0c617629209fd98af768978969c27f5633483ad65220e85ffa58a2. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:17:54Z), 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/TCAHW2422232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb9661f5daee3923b09725d0f63f77f90625d819c1007147a83f0871cdcf216. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJQ2546186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40bdb6a7529df2dae636eeb0b03874b0736882ff30011a94ea4cc9fc8ab1352. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJQ2546203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4bdefbc65752fcf4ad5b9d944710b149b44cf748efc8b8db3a92dd49e5957. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:03Z), 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/TCAJR2546217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8172880fabd28c9d7420ee1a9a3959b995b82e9320e6cb806118a21f7eb1b1d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJQ2546230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dfab7ef566a7634bd858d303418397a092aeafbe0cb008c3183e8980175822. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:42Z), 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/TCAJQ2550509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1ce3b750dc53ce3dbec655956225a68ee5fa00f6e49f631c2965c5aa3bf2c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJQ2550546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6e583e546dbb333d9433f71977d17c86aa87398ebda05800c18dd4c0670181. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJQ2550570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d15f6aa70d571b1b6a2ec341fb103c98f5a813d9511201bfae7f3c8badd7d44. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJQ2550587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03927b0106a9524aa22ed5eb2ede040740c5c30dd3118cf4a273461427d34ddb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:39Z), 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/TCAJQ2550598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3982136d7808ca87ae6d1eb2188f90fb823dba433288e5123f296453b9988f5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJR2550607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec3d8350b38b574cbe225478d8909681b4810c8eeb57b608fdedacd873569a. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/TCAJQ2550631.