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 0xcda05b6e984740f5c8526897f524d17501b7b62cac898ce5f38996d353a27b9b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c475daec-72d0-4346-b826-49788ba5e657.json and https://artists.proofprofile.net/proofs/artist/c475daec-72d0-4346-b826-49788ba5e657.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 0xb51ad5710d84c33965e6cad405e8b20edb45f8b071ea64d47cb27120ad2f6f8f. 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/KSA012309243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5184c668e9992f05bf803b26e4f95fe06af9b69f98f0f8de5ddbe033fd68814a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/KSA012383983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf7fddd5e23205ba273dfd8f94e5c7a55bd93750f2ca6384a362192dc61cb0d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/KSA012383984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ccafa641ee17a892fca0a9dcfa7b35f07ea45cbdcaef7eecbfba705dd9e1f9. 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/KSA012383986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd475436a82d64aeeb53f0904062d94d8bc2cb53a5bf78aa452aa2d30be1a70be. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KSA012383987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438d96ba15e82423902e294da6335d22c901a799ac9809380aebdf11ea399e03. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KSA012383985.
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 0xaf92e7080dd89c8afe5b14162e0bd48f11cb92cdafe1f0133d792b7ed8484570. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/KSA012383988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efa7b2398f589ee121e53f77efc4191788c96a8a1a5bfac9d6ae0a575a3a8fc. 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/KSA012331639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0817ad30e50743b1007eb25e55facba2f2b44e7ce3fb6439c88e15a10ea1ee30. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/KSA012331640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674ce458b69ce8ed199ed2e25fdfa167f2e86190346c7f5bfef68362f6f7d18. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/KSA012331635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d88e39fa711b086743ed3027c22a8648f1a7121d6794e8507f930cd82ee7e26. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/KSA012331636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf1e7572e9dcd3eef596e5c648c72eaa04d937a267ec546a8ddf36839f40895. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KSA012331637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483f77f51caf6760b1dda7556356e4d7793e9af2542e9040b2f18b2214d97ddb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/KSA012331638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c976e136afbf28db4210b70729f43c50fc6ca474a7a2c51d4451f8440999dd9. 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/KSA012324371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7318973d5c4b88638d02fef544b0496db8b22c7c79a43afc3a1302ba11e36e07. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KSA012324370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27de1c31738d32b9783424a7b4c79c608656b142e0eeb150c98132baf822a0b8. 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/KSA012282260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccac0ca1b3d493d488afa5e6447b5413fbda22d1972051b458e71d5985f4331b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/KSA012282261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f63dacbd85977b85ff67e9222639e7d3509fecb186098a944e8fde4f0d179e6. 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/KSA012246895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc63db7adaf2f71d706806019608143182092b42c753dbd023c5620b50e25d2. 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/KSA012246896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f7140db6f76ed3015f2c26b2bf25c249d883a06e7a4f0c568162368ae736e8. 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/KSA012246897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43745488c557484346cf7f3aa8df09f350306ebd6461e659255446411cd0e3e1. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/KSA012246894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe075e222e2b3e986609630a890c3110917ef41b81068d41b081409c801510155. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/KSA012246899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6403676f54e8d0374cd7c3455dccfdab1ccb4d06c50eb6ad7880b95660ff2c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/KSA012315425.