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 0x2285225ea8a5de99964bc7a63d637f3ea740a77f9f03f90918091b81cbde2b0a. 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/946f2545-fa91-469e-bada-7a09f334988c.json and https://artists.proofprofile.net/proofs/artist/946f2545-fa91-469e-bada-7a09f334988c.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 0x96cd850438e628f6e9dc7222ce27479395edb5944ab641f761c7095b5bdf6a32. 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/TWCT52325514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e198688c4cd0dd6b1796cc54ac9c6c2c1ec368cca3f11c0be85298f010c653. 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/TWCT52329743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb71f3524eecb0dcb5ae270472956f3c756ff4f12e5cb99a52bf8c439b9235e. 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/TWCT52327086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6a49a7466b788499d443784c0638205068834f96dcd9c5db30d2468f8f86df. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWCT52329746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd3471cddf726f551419947db8da7d1eb4f93c1ed430a06f4437c6092872b0a. 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/TWCT52329748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca550a842d0467e9876beead20201293c89b7f3f730d638d32f3eb1a8ad11610. 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/TWCT52329749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7934fcdf6da3eadbe6a0f8d4164087b9673d45c086ef84bd4fd29266594d7d9. 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/HKG731684588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb71f3524eecb0dcb5ae270472956f3c756ff4f12e5cb99a52bf8c439b9235e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWCT52327086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f03e58eb6dceae6d0be431707422f5002e06f77f7e112fe3d37c91a50696c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWCT52207592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778c6532c0f11ab15af5fdd59dbbd53f9b0a83bf8fe25a0bd5d6f72bf45c47ad. 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/TWCT52105901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf4d73b30cf285a6b1bf8cd5a847a2dd70a963d4681246fd78da12771db1dc4. 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/TWCT52105470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a5b2cea88ef301000e701a3ad3b65d287d64296b1b7188253b9f784b3ad240. 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/KSA012280176.