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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e02cf270a49ccc8593b74c7fcc415ef65ee1a2e06c858c2e406912c6f6d08ad. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3e5bca8-3425-4d2f-8912-b3fac6024ecd.json and https://artists.proofprofile.net/proofs/artist/c3e5bca8-3425-4d2f-8912-b3fac6024ecd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd721f2afe238ef47c8223c7ca49ea978352ec62c42bdf173da0f898089dbae. 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/QZDA61944682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bee0cc4114b823ee5d8a89f174f799c1a95a5463fce8fdcf35989f10647a42. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM2PV1856005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1372c1063a966ac0c4124f4651eaeaa52e7cdb81d41ca590dbf97fb1ba032. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM2PV1854578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba638ac6688ae8423d78dd5350a9c716d24a3bce481e7d21d87ce63dff13a2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM2PV1854577.
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 0x9c0cb16e23b60efc367da8b94e146c71825075aaddf99527f4c016e347acdbc8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM2PV1854579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611a26512f6398657667e7dbe841b12155910eac3c961c29abcf668722cb53bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM2PV1817192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe98b5056da4b78af34a7d24299cf498ae8f128de4c991fc82537b2ded5a3366. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM2PV1816694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf0527a7f60b987051ae15bde84d3ee411d54154a96192f2b831cc5f3b80b2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM2PV1813985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31790cc9e6dd54f605ba4107504104391f21f21b01bfefeee15aee9a41c93f. 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/QZTB92290226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628a140cc5135869fc398292159ace84aa91a74e78e78db3f84a3b4b751edb0. 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/QZTB92290227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0fd895e5f30dada6322e9ab64ad3a3083152ad93852bba21b8df92da90efee. 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/QZTB92290228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad9575630a9e441325104380abecbfdde20f565318b844f9b939eb8ab2eb2a. 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/QZTB92290229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd517feefb0b8268de151d86bfe475f1e35ae5aa78125360c81833af8accf32bd. 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/QZTB92290230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc8f3413488cbc3a0a257583086e99ec303018a96e0985b6b69383b5fe0f15d. 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/QZWFN2300742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ffbff2cbc18a58de439c26784666046e69ef3569c4af89e163b1763b3c3158. 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/QZFYW1986490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fdb45936e092379ae7afa87177b4622f268b960fc12b4d91eb71f6b0fc9327. 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/QZFYW1986491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c7e4139a91cf8b594ea09a704b1a36f18fdb55e6ab64fe02815ee6624155e1. 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/QZFYW1986492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07b9e7927154f29fffb4c7f50018a00329134fc978eeea92376108b463f0b6. 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/QZFYW1986493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904c37752134a079e7bff3fea5829e013964ec991bf7726ea58c9e65237f3264. 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/QZFYW1986494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe585c0a21f1e1e3067600f345a9c10303fc7933a0f94eeb0c6b3ed3154ff9b0d. 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/QZFYW1986495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c427bf7a9ad4f56f388939aa26f0c3b0d1e2a6075f180641614405cf3206892. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYW1986497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78397fc8dadc2e3c64c55861b3298e0ad648bc3ad95a378c2af3653d617f13ce. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZFYW1986499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fc55d7a23f695d5be25eecbecfc7a6df81bb8ac39c4f0aedb2ebb4bdbaf44. 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/QZES52445580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e2c8993d6f82e48c069d31784d3b6bdf0d3ee3810d3197a9d1a4566af5cb3. 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/QZFYZ2483716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146ab2b04de300848fc2affbb14a16da40d2106bd184ef15d6cd952d4a1d2b65. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM2PV1806873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d4a91e9d9b8a77219af4866bc941b4fb653ffbc10e417c8b6e4c6a878e9686. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES51816076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeecf60c76d7a5c5ab1ea25196ffd53d9f9a2122564d9970e98661b0caf8836c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTBE2313134.