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 0x39d9bf451be9c1317ba2b00fe9ffc9eb0f8156150880ee3d332a02cd36e046c1. 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/c9cf440d-83ce-4f08-a40d-2d108f3d03dc.json and https://artists.proofprofile.net/proofs/artist/c9cf440d-83ce-4f08-a40d-2d108f3d03dc.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 0xf2beb6bfe7cc9ae1611d09b2e91cfb1599cec21ad0d31964b9487fb645b64abf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX202075904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedeaf116b6af5e60dc4e62d8190d2d7b4c8b64720c6ef10589a77d6de125f55. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX282021293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aff8ab88a02bf666bc6c374daf52d15107f7261c126d3dd6677948fb8a8e84b. 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/FRX282021297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975c364cb740e0240d11e7522f5dfb8fec95b882f3bcfef77bf0191e17ad8012. 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/FRX282021300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6257491a3967941b5e90f461dde09e63a20a47d169fbb3a2aab91f26568ac113. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX282132395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c532d612bbf5718cd11051f6f2620cf211a98bb932c12d79f4531884cc83603. 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/FRX762185821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a3c5d84da967b9725ffc003594cd23f6765aa126d91c8caffb33dc1318f796. 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/FR96X2282962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa7d311e390ec62d449976737053e000d265354178fa9d99a3c68f968380483. 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/FR96X2282801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b85e1eb2cbce1aa7127293f55fbec1c07dcdb22ae9a1015612ad87c159eaaa2. 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/FR96X2282963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c532d612bbf5718cd11051f6f2620cf211a98bb932c12d79f4531884cc83603. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762185821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f34aaec4f65acadf9a45d8fdbe5587869c6ee6ed492b767e686c5587b305ad5. 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/FR96X2282964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e14bb00a723ebdf5f2d8d023b9a2c950fdda3190ba3e2e3dabde7fbbda0b0c0. 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/FR96X2282965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652f7b77e18fcd3a647ceb9ad4d47cfa271aa7207eaddca47801b406957d3228. 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/FR96X2282966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d410b6513f7035be27451f00e69b13539e64ae3e1355f4fb13b100403c79d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR96X2131231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0543e248eee2d809d2d5ef6a767dca150487e76eb17585485fa123d32fe063. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2282967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea7c7f0b6d07f1f8486407fdae18d668942e153cc654a96a38ce5611e48d173. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2282968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323bc325fc81eb1ba1e5a2691763b69b5dc129f46c010f4ccca87fff6f0e208. 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/FR96X2282969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6257491a3967941b5e90f461dde09e63a20a47d169fbb3a2aab91f26568ac113. 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/FRX282132395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e034fa8b7ef51d78269aa2e2eb3def8d220fc6f34f6d42cff973a83496574a. 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/FR96X2282970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc3526f6437ec8dcb4c35afa79b04ae0e829cccbf6b053199803b1cb862b07f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2282971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f18aafac89ef2ac281594e5c5ccef98927169470e309d4401564d37d01f61b. 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/FRX282248328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebda651bbaf7977c29316f43b4215bdf7f095f21d2988cd58d139a6e66932ac3. 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/DGA072350577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebda651bbaf7977c29316f43b4215bdf7f095f21d2988cd58d139a6e66932ac3. 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/DGA072350577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28644b55662bec06897c5690a3c9155100e7d02f2f4b690cc0fa06e129d4a37. 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/FRX872328627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee111688b6823b8fc0894c4c2069cefd827f855455e18bbe9900e9a91862865. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX282408583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee111688b6823b8fc0894c4c2069cefd827f855455e18bbe9900e9a91862865. 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/FRX282408583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee111688b6823b8fc0894c4c2069cefd827f855455e18bbe9900e9a91862865. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FRX282408583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa031dc2904820c8cd3ff4c06d294d115d69b08d7bbc31c6383434c16cb1a6d. 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/FRX282408756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bfceb0c60d11b74f7a4d93ea01820ab644b36a0f38ba26311665c0e358aad7. 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/FRX282408757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73b6c6b5f5d4d3b5ffba4bd4296a9a5d5991a2c50f9f6e13e617f6b8447aa3a. 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/FRX282408754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2c751f8e2df857cb96b057ead7cb9a6bbdcb110efc12d17def9cfaf8fe6766. 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/FRX282408755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa031dc2904820c8cd3ff4c06d294d115d69b08d7bbc31c6383434c16cb1a6d. 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/FRX282408756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bfceb0c60d11b74f7a4d93ea01820ab644b36a0f38ba26311665c0e358aad7. 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/FRX282408757.