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 0xc15b4d0cdc458132461ffb8726d8d1cd4a72eb03cc159fa0bdc3910bc2dd1fd7. 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/e717fa5c-2ddd-4fef-aa28-3b163d0b0e5f.json and https://artists.proofprofile.net/proofs/artist/e717fa5c-2ddd-4fef-aa28-3b163d0b0e5f.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 0x37decc32fe1d701dfdbf390d8b20576ed563311b6e3df1a45e48b17a851fa76a. 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/TCAGW2393102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31022d4bb928a41221c7650a227f11a47efbcea73b1384573487918ae1adcb21. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/TCAHG2377730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b31b8e40ddbc68bc8039a74ce01498f385769dacdff55d58d93bd5f9f74e9. 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/TCAHI2368311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67324c5c49dce41b0f182c1ec71ac4823b51bfc3c424e5cc426067b07bd8b7a. 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/TCAHI2368342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dfef097624be7aa2646f5256e29ff1a23f3d06c4c1334051d14710171c8c73. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAHI2368358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35460bae765b9edd1e0c0aa6431b4d2c6e7de66e02c9ed69ff86848ae04685f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJY2450020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3591fcd4492e6c90fc72a05fa93e564882f3eb5842a5477cd11b3d297ff706. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJY2450022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4215f5d70dfdadba35a033ae6829a57488c36ac0e17ab0ff6caf5c7da8cb8f. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZNJY2450026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdb1581a3c55757441634232c3bd601072b7a14867ed12c525753eaca6722ca. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZW9K2404044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bd297275398efb468621625b8bfd65a09c8392f262d316ebabce53611c2fa5. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZW9M2463065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dfa0c90f774d4efd61cdac470bf701ff03723f90b653ef82715ad022779435. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZW9M2463066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d3bac16059315e1bbd7faa8f8778989db1093a2ce1649d7cc7f3aa791e75bd. 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/QZW9M2463067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419dc86890fc2ae4f5897c43c9e02fab6827fc5173bb421122d03c71deda0d61. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZW9M2463068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d80bd19ecad8c55a889247dcc24a96723a7fa9fb14f14c4537f4cc983885fd5. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZW9M2463069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be1eaaadb165fc50a7cb8277668f88949d0bb1576ef0ab8a0197559d049c29e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZW9M2463070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7467b7a276035ae7fc8ba9c9d7de3a46a75bb6ac8e2e6960c5bf3ee17ebb4d16. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9M2463074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8deca68801c3b82608609638805696746b149ac9c4e687047cb8b239f0fefdd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCAJK2581473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f55e381a1508e9b408ff401125a6f6b0dd54581ebc439e3ae544335d15353c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJK2581479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dff740de30ce32eaa284a865ad10d1d24888b1442aa291fab9d8bce2d6fe16. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJK2581485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4986a77638360b8d0294292ada4434c836b26ea6e12e85357ab7db375e7e6d2c. 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/TCAJK2581498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523cf5b8a30e22135ea5c895967536032f2e31bd086938eb327ca18ccd059881. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAJK2581504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ac03572f8180bfc548d8cf381052eadd1f4c309cd395b20811189ad9d0cac. 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/TCAJK2581519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a058c83c1e9bfe0c65521ce46b6867b66f33be9049b9494eb8b5daea3eeb412. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAJK2581534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012b6378785a2e16358feccf2cc1ee704b6a56c343ebef6f1d433ed4f19cb3c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJK2581537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613ca54d469c27bda002bc8e55e36eab8ff73ad9dddf55f4c13c2c3ec0b59760. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAJK2581542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1a7c60b88fb477aa2d7ec9d3d2dbd6341dcb13098c605ab43918393b2be2a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJK2581545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a855f4091e494c3669eb1f15464d15f8c986e151a2ee0f0ec0b925049d02553. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAJK2581551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffefee193e854e98bd4fc5a6667f37142b26530e960c635ee85a15709f68fd52. 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/TCAJV2511954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4a1b5c71a4216c0540732bcf19374ca78ae9695900ad0509d433e22808d64. 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/QT6622500007.