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 0xf9cd6866c64a25378c844050eec055f3374a99bacb91a0235be30ac62a5399ac. 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/36b32deb-0717-4efa-93e8-f09f2c5a454e.json and https://artists.proofprofile.net/proofs/artist/36b32deb-0717-4efa-93e8-f09f2c5a454e.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 0x4295109882656a5b895a0d0749074ce8fc6199a37638f92da2b0817fa9918928. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:41Z), 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/DKADG1500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70b6ab720965a308713e5a841ef6cbfb639c5fdfc881e2d8b417d7e7c6e33a2. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DKAZA1800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7672aab7abea7e74391db7b654bab0508b893e8f9e1da5ce00237de6eb2b39. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DKAZA1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b90cc1c92b8033b622378c665f344f5979492a99c7129e867deca8e6b90542c. 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/DKAZA1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde3895e2dc003d8444260c37f9825f8a6c724ceef06c5963dea75b12319241. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DKAZA1800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f258838a4d8a485f18d0efaeac54cf68825008f682c93fd3caa602cea53af1e. 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/DGA0P2331032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d326656ac72aa1c927080bb68601940523a9fa6247251554d62f02566ba1a4a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DKRS42414005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170b22e7436cc8d82723d654934e954e366e5514f5f20ab62b28fcf95ba0a2e2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:59Z), 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/DKRS42414006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a63c0cc027178eb7afd58c0f946335e5d6bae5679922d1154f533d1f12661e. 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/DKRS42414007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22729fc5f569ef9e1f8ad94931e03c32cae555f1331930a6d41818a3cfa46e6. 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/DKRS42414001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a1518c64c87fc60281de10e305f6be0cb30d461e8badfe548720fdb3166d0a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DKRS42414008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1508e06b85a6a6353853c6bf6338ea5edecbd84ace29404428755df959d56f7. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:09Z), 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/DKRS42414004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f258838a4d8a485f18d0efaeac54cf68825008f682c93fd3caa602cea53af1e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0P2331032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bbeed3f43f10db487ebb601041351dd162944be4f1f525d6f508e5c4fe1384. 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/DKRS42414010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d981be7c2145325e4c2a4e7550d4bcc36ffcf0b7fc22e984a207d7a0695475. 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/DKRS42414003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e21532d36f04dcbaf910882e86eb401a0bb7898943a13a9a12aa7932f1b3582. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:36:36Z), 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/DKRS42414011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f63a71d43d5ed3643adf66b88ebfffce2687ee8b3dec4c4cb6668c6a118484. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKADG0700287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12defadf10476882682016b9bca212c793c0af493e4e5bca7767ce009321b80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKBR70901404.