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 0x07d7101bf5fe46420949bcd3056fedadbc9de0d6248ade674bc6a5b0ec2f7ebc. 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/e5efeefc-9a38-4141-8d94-ec569a6bb3fe.json and https://artists.proofprofile.net/proofs/artist/e5efeefc-9a38-4141-8d94-ec569a6bb3fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
What About God and What About Your Friends?
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 0x54cb30021c9b0a597c609c3f8df13d20be8865a989199b530c50bf417b0e0449. 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/TCADC1701452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc9dbc1327e55328e3e14c4ea661e0daab7d4e9e497aa1bcb313518b25cd59. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCADC1701459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb3e31fa9b23ca3f12303ef239959284e24a47c93fc33c69d41233cf05b71b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADC1701460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb37f1d5cbfc45ee3c585911ff4dda389a3c4d8283d0c47e1ea26067a85a1019. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADC1701462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7217ce4daacf266f6c34b3dbe3fd36064fc1881e9a662a2cd5989f441121291b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFD2089250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ba71f91c4d54a565a51395753b8b13276443e62704c3c75199d6bcd3433b23. 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/TCAFD2089266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce1811418411a566a8315c1087e015df4d92626c405cd80a61239cea74e4155. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFD2089269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f06a78d3b27c223e8620e5987f78df6ced757f9283a4b100abe3ac881513044. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAFF2028775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca52dc480985c50922946e348f87a7e830a1e654c25dd63aca85f3c9392be0c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAFF2028780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d785e21d9a5931af7c86d6c2fad0a02c9b49c49253cb7fdb76b42ee87e29081. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAFF2028829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71d83ee3bf119607ddab31a40c479d757d058f303710e2ecdfc75553ae003b. 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/TCAFF2028839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d779c2f3ad49e7754b25e2ad227c084306f4f258808e8adcb4b9c58c15bad31. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFF2028984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a722cc0e42858ae69e041f41c15d43dbb56e254179fd09d29b85af66a1b064. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAFF2028890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785ca0e45a5704b3d8d7db284dd1d0e29930ae914132dab567751ac51f618380. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAFF2028952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5094d3954b500993ce06fa2f8e59e20dd0fd833fadbd945c531862da5f8758. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCAFF2028957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf710c2454204d294c30091cca7f2a6c5e36b9c0059eb102480938de459114a3d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAFF2029009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a3cbdba9e6996f36d382ce34797c2c6281df8e0e5fa0d6afacb983d34f741d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAFF2029020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55de076458f32b3770da6b0b3b68af112d8ef2e100742bf0e2a19c6f314c46b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFF2029054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a58b717d57331cb2220d66f7aa643b711721ece9a1c1f76293d62327538205. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAGA2200914.