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 0xbfe32cc3052c53fdb5383e098ba4b3bcc59e8afb6db3acdd4c41fa59ef08ce58. 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/b09e3461-ce93-45af-84bf-4697a2f6c52c.json and https://artists.proofprofile.net/proofs/artist/b09e3461-ce93-45af-84bf-4697a2f6c52c.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 0x76945d36f8d48d3d92720d11fe1ff498fe2ed752bc01e222341287ad0d8304ed. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHN42071866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66583dda20c4811f85ea38db2bdc65f822f9592e2e72b96a48cda84974bb4488. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN52010198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c601f5d5bd2632d8b69df91f64b735f3dda4658eb4e39ff2b54c2666a98bc96. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN42097463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176c19f192e1aad0034258377e362add00265c8c36d4f3676cc9b39619dbd7c1. 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/QZPLS2194068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1625fe73a3699e4525775ec6c94c2b4eb6cf052d62c1c74adb4ff45c2ecdcd. 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/QZMER2142661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1068d575a390e8c4af16e827d4d74a2cdfd74d89fe49e4d718f80f31cc19b3f5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:19:53Z), 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/QZTB42288714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e9a685a48d5d7593553fd8593faad13f53a6cd9ecc4a5cdb187d2291237583. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3Q92324164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff81deca45428be535d79aee03783d1e027781b84d012949967f69a561e9685. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GX3Q92329507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277a4fa6a091694676dd2536dd8ce54ada0cefd51a2cc1d100e27046c6c86dc9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92335208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d399f2ca8f82776c07ac6d456b8f58a17de2cc776ffc86eeac6b49126739e6. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GX3Q92335210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a09dd7afc8c13d9c98249b4ca1808e0b4af0b81d9ec7a22e3d2b20a6dc239. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX3Q92378498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64993502eec6044e66da23085334236cc2b674cd248b8978b7f315e33cb26310. 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/GBLFP2307706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813f7438f903c37734d84e42e6cd6f04ad1e7a9c81de3c8646d0536c635da0b9. 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/GBLFP2351127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f81ea6271ec067ea0281c3be70aeeec35d5a952011c7d9370d6b64188431e9f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:54Z), 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/GBLFP2393290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7fd76c9fb91345fb6d9e5ab7c078767a95cd2b8ec07033d89b4349ec1eb258. 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/GBMA22465442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343f3694baae405f7d625aed8506f95a33b0ab3732152774d3f421287f2ba9cb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX53U2379810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6afd7d42c0b4ae6864fa0834c4c731e51d8f984a4eb45bcaa4887859443046. 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/BK4DA2447365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd4ce764d361818b78f0b7c745d57f8502a29c912307ab5681922d7f15aa402. 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/MXA2M2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd4ce764d361818b78f0b7c745d57f8502a29c912307ab5681922d7f15aa402. 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/MXA2M2300123.