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 0x55f44e6ffb88d0fb0e874d0f0f611e7972aea6cb63d38feb44af2908b91db63b. 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/cd67a3d8-37e2-40a5-b69a-e57786c98c85.json and https://artists.proofprofile.net/proofs/artist/cd67a3d8-37e2-40a5-b69a-e57786c98c85.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 0xd8d3a3b037ff7fcf92eb43e652ef94876231e4b95cb3cc1a22eb740da08a0a64. 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/GB2GX1900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8478d3d6aa62f62f952175085fd5f5203f620aba7169bd474f5f55591b775fc. 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/GB2GX1900378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d831ad37bb2ac95f88cffc51d5aee355d242cdf1f273d20d8370713df52a546. 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/GB2GX2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a483da59fde33263de2ffdd9eae1542fdbb8816465be6f15756f443857cf8b7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/GB2GX2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efb18b74cebde1d89976f9de14d4ad329e2f5f0d42f7a98ad108ff5f5830743. 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/GB2GX2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f43259b68bd825fc325487c3afe8bea0b112f5d44fa02cfb36f0f52529381f. 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/GB2GX2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faca0ca5ea7df6c2b1628e8e05524b0d8944e8b7b6e986179d27338dce3c246. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GB2GX2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662a441bacd403bddc03c91c4b54ce34a07d3519cbdef82ae7cb35ba2d9f2b57. 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/GB2GX2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa86a5f4274860095cace60e316636ebf627c4dcdb4ec10c902e1c10f1d2f0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GB2GX2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d01122e4b4b333d2a4f92ce197a3480d8d0ca0633b0a52f2ba4e6894b88b1b3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBMA22186114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec192a5a30e7ccfa58e207f55c58b04872c85ec0f48034b596002adb39ea9106. 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/ZZOPM2220824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb467f661c321720d4baf37687e44eda79f1dad598742225815e6210f76e3c067. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKXN22280153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ea6c0a050c8f28d0dd8446a2fb09d72dd91bcdd71a7d631d89470038f944d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBUM72400746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55bd1df478b6aff5f08e3a2934c3629ebc80e5fa35b45e583e5e5213dd66570. 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/QZHZ52240304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c94caaf9e893672b9200584ed52eac7d764d89bab760cc3420831c4353ae6b3. 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/GBLFP2393701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65a60b1dfd400ee1810a6e86fd75640a1fce103871c3515d323a617db90f678. 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/UKXN22316070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b029c94e0da146edda0c6a86cf4fcd8ba85da40bafc94134ac7a7beb674e9a3. 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/UKXN22316071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519415f3097837289ae75739a40375a6300c6f4ab1a544ca0a45be57b41b4beb. 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/UKXN22316072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c94caaf9e893672b9200584ed52eac7d764d89bab760cc3420831c4353ae6b3. 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/GBLFP2393701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55bd1df478b6aff5f08e3a2934c3629ebc80e5fa35b45e583e5e5213dd66570. 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/QZHZ52240304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6566a4fbdfa0503c4c72d6d27493a61ac3b8a56e3df236df651ac65daab3a053. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB2DY1900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff04921d211af247e3d016ebf904a18689818afafd2ce1722f3bea2bcc41d5e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB2GX1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2057f2747cecc9d2fa067d9239799800ddaa7579a6bb9e5ab261eb32a0e74e29. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNWQ2557204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dfc5bebd79fe91755c5b9d00261501723d603a14af964bd7a85eee131a9bbc. 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/QZNWT2531308.