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 0x865c7f0bf534cfa5688f63e7db9dad13c613ab83319a03ca0f406face6b52be1. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bba9a6c9-cc5c-4303-824a-1d78ac3dd58f.json and https://artists.proofprofile.net/proofs/artist/bba9a6c9-cc5c-4303-824a-1d78ac3dd58f.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 0xc7fd6ec1b45412a18f4bfb7a3d8f68f0784881806615008f6e3f6dc1566fbc94. 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/QZES92395907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef4071341635b84a01ec600a3685fbdaba8558123195058fcd71edfa0a6b023. 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/GX53U2341514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ef1067edb2022b76f7016dd2a64927b82a4ca39f7576e9f66bb0c1d0412ac. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GX53U2367603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dfb99c4263ee2c3b4a2dd426b91d94bce7016e054137959da7881b08f33062. 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/GX53U2367604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982abe9698865a820994afb655d401b52c80baa62510367440f2390d945357a7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GX53U2367605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0f4255365e51984bffa87db0007cdaa3506ac5de7bf85b0257627fdefd9d0e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USIR10000591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ddf40ae522a5b6ededd3e1266de6c2ffa78df69f0453bf538893c47f166633. 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/GX53U2367606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f265c7d5bd0028a7234e8965a8cd829cdb04dad92f849ef9bbb17993e4cf10f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZSYP2443794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2921744233c3b376650afe07dcb68f0b31729e63dd3b93fac06b2b9157cedbd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZS7J2457394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fec51ae2a1444583644ce81b45a7b879bc22a154d2d3b165090b1cd17e63ae. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZSYP2495968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbee7d0767fb502f7c383b8e257cc88ad58e421b6f920b07f2c8c6614236f7d. 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/QZSYP2473931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46b75dcc383c1972e0dec739c980dd0f9754062c1584dcb400db88272c612b8. 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/QZS7J2425790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea3b235f4f706f7057d5bc704f449ea7bce4cdae0fd3bebab47b38754b1c590. 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/QZS7J2499870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942003d0301082673f0bacca9d00e12455d102f9c777296ce606763297341645. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZS7J2497035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8a949080484feb340b0d6b259c6156804ddd4b988a8583399b13b47f246fd3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZS7J2466375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9367061f5e88a797d54855cd75a3318ed6d6961260f609f2d036352303a63e7. 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/QZS7J2469629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5739969cd888291c8427bbf837228d78588825865640a8884b2598c0e2931ad. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZS7J2486777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ba58d26620c00725c291356ecf27b3936bfe9557b263a288196e109a86dab. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTLA2548165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971d689ba692e938d4096295f90f716b8afcf857cb478089a597c5e25380feb. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTLA2545647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2078f0a6d03d15ef2e4fcb96e81a321d1341308744c74af50a2c7a1ee7ea4e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTLA2526429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656ff85c662816c1402718755bbb675452e9bd9da3c135512811c19fbcd160c8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTLA2549968.