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 0x86e66c5809885f875bfba6c0b7e303ff3fdbbd00e408ce6a2bdd7023f5be3d57. 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/7edf4f9f-e51e-4a21-aafd-433dccfa7413.json and https://artists.proofprofile.net/proofs/artist/7edf4f9f-e51e-4a21-aafd-433dccfa7413.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 0x8aa61586d6955cf04bc8fab0592d0b21d32ab5a3ceaae924922cfb19b231921a. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GBLFP2533685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7111b2d9332235690eb5cd2a5665ce714e20b988680aedc3e76b63b25bf71ec. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GBLFP2533686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868b8034983f4fda99ed16fb8303903f0f85cdd830ebc0675acf7582ff351b74. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/GBLFP2533687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4acdc1a2a40561c53769dc08a3d727f6532f795d5b8212f6d87aa4b4fdb669. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLFP2533689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04b6f56b93667ed48f8983b97ef828cd6bb38f521a9820b245cd7fcd79dba4b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLFP2533690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8716902b9e625d2e4e161d97c5437a295bb9f18cf482b36070dda6c0e1cfa. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLFP2533691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e397e3f5df54207c63810dcdcc609f71289bdf4980e5660fae92eab54c83a81. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GBLFP2533692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b3e0ac7096f34d8e0dcf806ef678e8364277e2dda42fb1199376a6bc89422b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GBLFP2533694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006c48a2323a4ce76f18b24dfbb744272c82c698bc274a720a40e6bf5583b7b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLFP2533695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74936e998eb757ab8674c68d219fac6b5840f17361379ccde13565239b918b29. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22561106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62df9bb7964c775b033fe25ebedd16b6f6cf87ea307c0770721acb540637b5fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22561107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b56930373291bd36f0270817630f8e754b8fb42f873df23b74146324c49d9e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMA22561108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e1001efb5ca1802159019817b7fecb31414551243d5e06dc06f9cef74119bf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22561109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d6237762d7b38b868b48f25020d1569267c2882a9a4cc52fd710bb508a2519. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22561110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd0db4b410fd7d714ec9932981a03ce4ee27d54f0ee615ea7b7d32dd2cd8f52. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMA22561111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e1adb008170b0ba3b3ebb7235c66f45edb7e67f1c6f0af71a0be223e039f6b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22561112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2529b7b38be82c5f546464092b0fe34cbbc80c7c4479878d83e5775e64c3e51d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMA22561113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919762ed2695b92eb7ef0d60d76c2f5f4b60e5aae2ebd6bedcfd7573b9d5cd7c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22561114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf747eafe6cfe2b8d62738cd56de07361b92e43d4895178498fbd43bba9eff8dc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBMA22561115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea9a2b5afbb2d4e30a66db2de7c3c5bb67e0f34d458241e25a50b23da2c2472. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBMA22561116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2ee0547a9af8f7fdee018d0ed2516732a7f9c0295baec981689f9eb2a0539f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBMA22561117.