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 0x4c8918084350a154bd668c0f310fb6b287bd8e842776e2edd17ade5f4e3bb754. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3611703-4bb7-4424-8ba6-3da41f444fda.json and https://artists.proofprofile.net/proofs/artist/a3611703-4bb7-4424-8ba6-3da41f444fda.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 0xb2fd0753fbc35d1e4c43bac00189a4eb9f278762fa569ca79493becedcdbff0e. 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/BKN2V2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6151be8e90e95aa57e3cdea0e1f2b56b88a4878b514aed08b8b4d9ccdcc1270. 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/BRUM72400384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7711e7c45bc736ca13e7b6407e6f7a491d27ae34f5c9206bd56964035dc3afb. 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/BRUM72300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0298dd8337c2c5ce02f2485b791879c94aa3297af8a1d8491dea68419e37b816. 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/BKMKR2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb53660a3a97368730816d38912f8e754971e281af7547d8727b96fb2d289727. 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/BRUM72301568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc5422058c4f88c9324c20cff6efd4bac0a86a5f9830afedec60c08ba9e9146. 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/BKN2V2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165bdae244f882bc81b9a39a6a08973d39961d57107c69b51b09bc9c7e5fe72. 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/BRUM72300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ccfc1041b5352a25691c6dd64b50bb189f1a49be3f4dc40409bbdbe09e9e0c. 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/BRUM72300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af46ad517bfc42a83f6bc58834ff9fb450877f43482bb618b1dcf39aacb660e. 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/BK1H22400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a15bd94c9ee375492e5c5acdc2085ae3fe2d68c132994b64b6d4a27b19fa8d. 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/BKN2V2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607ebad3fa6b2cbc23e60ff0e7bd2267392bd3c9d608d9c3f7d6e3612de17b2a. 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/BRUM72302190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99cc16683e9744a926a727868959bfe03699a86ca5f9b20c061f58cc3ab4210. 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/BKTP72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f6d34c73488cf436ba7601c97275457bb15191784ecc4a8c0f61b42164101. 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/BRUM72400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c66ede4f38306f1abfc5f7bf2b5e0f9be718c314fdd25dfd32e39b281e22b9. 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/BKU8M2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad666d57305f8ac39f0021ffcd31e045aac7e96d84e7a32efb58c604c65e4fbd. 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/BXWOW2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf955bcaa83ed27207f67286773eea2faa43b7b3e92c2a83c4ef450bee0e312f. 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/BXWOW2300320.