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 0x72c2f5ed749f1fc735368c5122efff0a8f18b6d1c1eab2c8f207d8b95aaa41fe. 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/52406cf7-c6ee-49e2-a71e-4eb8b9811b14.json and https://artists.proofprofile.net/proofs/artist/52406cf7-c6ee-49e2-a71e-4eb8b9811b14.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 0x6931e662506a9166f26271de1c3f325d8168fbffb230ace75dc2f3ee56e73728. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42333236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e4c94d010dec1f345eb863bb1fd132635cb5dbe60cf14ea05e9565b9eea0e9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/SE67Z2301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49106f5eb465ef2edf90d34d25aacfff965accd765c4facbfd78ef6ca103732. 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/SE67Z2403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59992a12f37cb3491c3178b2d4ee1ae854d42b8549fdf3633e8ee1709bd7da91. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SE67Z2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4cc453ed7ccd65896e802c9b3f568573b10085a0835ddb8ba3ef24ec1c8f05. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE67Z2403801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c485d222c0a0f50ae02d363978f55dff3b09c69131ecd1ed2cc3ee68139d1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE67Z2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c31fbb57d97b46782ac32e0dece9afd6b5afc88e6e7ad3c2c633d186b1e8103. 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/SE67Z2302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6129422343947fc0fba5f9b0a5861cf06c7cf769237f3ea49049b01d5338b. 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/SE67Z2403401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4092756cc315b55be5e5ef2732d067d2f503e4c61782c0cba8bb3f5919411cb2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE67Z2400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e52d776eb963fd7178aa891607f16552ed533c4f18e53d5a60ca23dd03c9e4. 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/SE67Z2401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9371fb245239e4a2a1918bb29de92826e2b3d7479688a0aab6a109669b646ba. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:13Z), 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/SE67Z2403501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ebac0fde0edd7eee152663515edd9cfd388153daafe82a012b29ddfe7b15fd. 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/SE67Z2401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2fa27fde7d7ba0c640f94e039cb7364d04e0eb32fa1b877fc556f76461cac. 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/SE67Z2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12721ec4749830715132d728fe3dfa5a9cde0115ea13e7208aa6025f51285bd. 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/SE67Z2402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e88cd42c57d05f1ba33557dcc50d6a5a714427005440ffe61f801867c037482. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE67Z2302601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25da209e9382c214874b3c951602363a8f4a4e3da035495e8e3bc46eefdb8340. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/SE67Z2401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2a176c6b2e08f2e54f64cac529d791f25515756844ebefbaa670f726a88c78. 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/QZDA72557997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e47b8263fe7f926209762c9a688a9d79f83e65334315383bd213b6a013732e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE67Z2503401.