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 0x85742ddde6dabab61d3c7e54897a933571135dd123de50bed57bac8b221a9a1c. 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/d8fa96cb-8532-4721-9970-91c1d460e574.json and https://artists.proofprofile.net/proofs/artist/d8fa96cb-8532-4721-9970-91c1d460e574.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 0x61f9e61c6bc7b3cedab8d5462112313fbcfaaac263f85097e39e75876bcee5ad. 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/FR96X2419266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d05c5d12630026e7246874a948d2aaf0d1304f57e3e05c50feddb712c7be2e. 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/FR2X42512208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf56aad5dc2e9ce6a24da43050f6e9cdf39ea1a81e629facebee3295c6fc01. 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/DGA0Q2430095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951d89cec4323cfecb76c1b59973d47ac2db38b0d479841a714a45054d6f530. 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/DGA0L2499834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf824c943e3c652c6b770658c2eb0a75df8e2406aed5d0ee0657fd7b469e96e. 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/DGA0L2337869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164c6be6363f59e4a574ffb886d44d700aeddd421e09a0b05606453397b8005. 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/DGA082314145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88329f56d2b74563ea3d07eeab545830450da19d0dd2457bb9e97c10ed1f839. 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/DGA062346464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f8d1341618bd3c7c5c0fb417538acf51c203e49ed1416586d84e5683b1929. 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/FRX762339694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b6edefc216c37959cc5f4a63925febb2eba15dc2bde23e8334f523fc696d6a. 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/FRX762339695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb3c0b8a907eb49ff093d742121948689d72208ea39cf5e902a6318e5954692. 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/FRX762339696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd289dc30879e6f411020cfe3acef51c38f9e7d93cac6e0ec11f56f6de828e1cb. 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/FRX762339697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672a87771aa539bf183ff149d2bd23745b337a10505b1c916ff7b13f887f524. 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/FRX762339698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5e18655c24b4b86dd3ee4124c9d35e7a7b1180a86d4a4bcb8dac5bbf7317b. 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/FR59R2344653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5e18655c24b4b86dd3ee4124c9d35e7a7b1180a86d4a4bcb8dac5bbf7317b. 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/FR59R2344653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dd905d71ade5fe7b46fae38a7d96157c5fb37665895f67774f6bfcebe4873c. 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/DGA052213171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1877d8e24c0e04961d51d33c1cfc405ae95a1520b608507d8f2218277145dda. 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/FRX282245902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb245aa8c4c62216329f63c56e17b7108e916cdb3db3e3daf325befd5ce5b809. 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/QM4TW2293619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb62d8ccae3a1c423e1e7cb61a0a046f2784c88be95d4553d783c7747968ae4. 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/QZS672130774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d8965d3c28301382ca29bf4565e1c9d5785256650cc79916484c52e39bac26. 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/QZS672183525.