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 0x708f04895b68cb2408f1b01d02f455c709ba68c974dc07c82026d75cda842780. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fee5dad5-8af6-45d1-9dff-7338b6c545e8.json and https://artists.proofprofile.net/proofs/artist/fee5dad5-8af6-45d1-9dff-7338b6c545e8.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 0xe900ea9781c1a512440d39cadd66e214b7151b39a0af6766bcd6a38685440b46. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3Q92444903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10010f88b8c8ec7bc6749a366f6da5e8ffce872a1f958d3b1d978e6fbaa727fc. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GX3Q92444904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006368778d17759b3910fc9436789c55367ac4105d692db0b5b0c1c99ec900f6. 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/GX3Q92444905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a1d6ccc2ada1d37b651d04dc259940079008e8affc410a8eee5b7c26210647. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GX3Q92444906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d35c69b283e0725abd8b946b98317b5ca451302a7ec16734413e026e9987136. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GX3Q92444907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a7ff91754d46d0415f0ffa277864b4bec00b1149892a9ca2d36edb9faf78b7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GX3Q92444908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db13b411d1f65933fb6c467a85b5c2b9b4d3b7d06260d19fe802651b637501e. 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/GX3Q92444909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbb388bcee3f07b7cbfe2527835d67103fc19da5cd9b4f204b7a3509fd64ab7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GX3Q92444910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04df99c9cf8f719c4e27606a96ff019fe45607aec1d10a4f8fa5f13a9353d9a1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/UKXN22414848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2273c7d1f892ff6b73514a583ee7fadd90376d5c81e56f407368f378b0d786f. 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/UKXN22414849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea15e27d223ceefc20841a0871d05701a1ff75cbe354d698701cf9cc55169b8. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/UKXN22414850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6528b2db96886f50469ada89dec0e8057372ab4a401d5a4c61fe425d8867828c. 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/UKXN22414851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95060949544620253638f2684918236b4ce8d0135e01a95e7d51fa39858b93d9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/UKXN22414852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b56f1523432c67f80f6c78742d0487a7f78ac61e86b77e5decc28c52753cf89. 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/UKXN22414853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91485355a3ecd1f3929db0ac62163dc5542eaf73f3996a9993d672a3c17e10f2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKXN22414854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f985eb452a9902fb2e33a27dc2b411bafec6df531af0f50aece679b566ff75. 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/UKXN22414855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fab264f9d1333a4b9b38b4422f4622acfb92bc32c599aabf3722993817e1f0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBMA22442759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ee1a34f0762bdfd0617d1dae2739cf7cc81eaca7db460279a7f6ad409832bb. 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/GBMA22442760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc309f9ebae3220fc433d6d09dc956dc749334a68cdf87f4d1ab7073e3a264c. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/GBMA22442761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7496625da9e819ea4ee3fef4de620c5722ddb2b3fceb88d9c610a77b59ecbd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBMA22442762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5668bd725a0a04c9101f01f3574bd0ad31ad7629af589bea55c4ebbc800c079. 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/GBMA22442763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64c0a60335811a08cbfe136ff487c71eb4c3c42e9bbeebab9ef7282a09b0b91. 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/GBMA22442764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0951ef9100991dd9de86b80ca407c4c10535ca2f0f0601ff441674be55ee3ad. 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/GBMA22442765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1189d226a36a2b11d0b74b28250cb52151018508900c1dca86dadac79101869c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBMA22442766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b5ed2f6cc2e43c478bd73dd75ab330aeaddfcb85ff8cdc12959ec2bef8d50. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX53U2331515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad788ef005bc933c39f3e6a4cd8c8b6ad5069cce93cc15ca5f8740d0680844b. 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/GX53U2331516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91eecf9ad97be3ec99bd42ff645f80109fdc4274cd2a53c7d9eacef7df835bd. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GX53U2331517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592027773b52dded8835d2e05c4afbb3c17308fb44699d3528b28c40c9ff7ca2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GX53U2331518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcadc141474535282605e4dc458bc614c648e2805b1ff7e20705ed15f0fce9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GX53U2331519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f5e573bf4b3eb13411c0be905a3dc705b00abc75371c3f3b153c226ec18678. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GX53U2331520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ec344b78ef2d7abdd060678c9961ba562ee896ca1f10739c700b4c7e508a53. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GX53U2331521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8154e123ecf6dd8a93a0730c42333a96e923c7e498ff0f5d5be9f3463e7fb7e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GX53U2331522.