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 0x279a4418e3762a3b5fa99b26be27533cc9be45c69d1be27816cd5ae6bd938b1b. 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/14f4c7d8-2ad3-412d-bd1f-15671b94f2ce.json and https://artists.proofprofile.net/proofs/artist/14f4c7d8-2ad3-412d-bd1f-15671b94f2ce.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 0xc616d883b2f696b0775abc0e34c286ab10523b36b3917af6c75349302f04a52c. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBSMU8778969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32890504b17df07b2e687c9c15ab0314c2f5f08fa36f1981fa4c2076f3e15dc7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU8778971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15495fbde6959a5b9f96125ab86f951288144762506a240f178e383c8701e308. 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/GBSMU8778972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1640731b31b8f0b618e60156864bc4a52ed4cbef9fae12d580b290a21de383. 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/GBSMU8778974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0881eb7d55e4f02a458086dcf9bb6ed50c1243aa971b717b7bf3664b311980a7. 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/GBSMU8778975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a099c7e9c92cd340c3242e1b176b5e0993b21c25bf20661717d3c1c56f4696d. 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/GBSMU8778976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad69157c5c0ccb1c47399317b58b47dc1f9945d853335504a79dfdfbd14f66a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU9059272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4995ceb5da3f04514404f807476ba8dda588cd989cefdae6af635906477216d3. 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/GBSMU9059273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a42b5688deea26490a0aa8cbf38cebe7002ad27e301f60089913ff4de4caef. 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/GBSMU9059275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404a114cc10ada198e3f1aee72060b1084157519c312f206a437bea681caa6fc. 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/GBSMU9059277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf201b876a6c8c8d1a449f47c610d6f1ec50c03707c74a4de5bee125e8c67a8aa. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBSMU9059280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dc65a8f53840d14e736503a1f11f68c330aa939ee3c97b6b119ef094bced7a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBSMU9059281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d954192a3aa87b4c9831325324d182042738db6c7e8b9f50fea4068d6aaf3ca. 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/GX8LD2272503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27237f7671ce00b9ffeddcc16e5a694aaeb9a4976a77cc31d07c09faa1d4dff. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX8LD2233649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db1a64ab21bf9bf0dff16f91ca64bc552de8df59c3d88251982195d568ac22. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GX8LD2229738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9a1f4e21acf45fc5f1aae3ac22464bd31d0117e0b7fb513f0b2d095e333553. 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/GX8LE2337953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee8c3bac329cce974ab067f5289b58f3e10bf77e6d3a790caa2ffad6b4bde76. 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/GX8LE2386351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7993c29f347557c89cc8f816bed444d7668fa2b0e2ce6aa093991560de6c7e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GX8LE2342194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd8de279976e20b094bc13980e7e7edc9b16703ec780696d198503823e23239. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GX8LE2302747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7184bbdcfdd856093df6f9a3fdbf7befb804291468a4ef94422f9eafc0a63927. 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/GX8LE2366321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4627c838b3d79685f4791f37d35f6726b1f1f79171fcdeed48a4babe3d417405. 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/GX8LE2337130.