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 0xffe05e21810566529a6054cfb7a23ecc70f52f5c79e56ca9c0920f3bd93db508. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aab8cbf-d6b4-4f54-8029-c39d2d22cee4.json and https://artists.proofprofile.net/proofs/artist/6aab8cbf-d6b4-4f54-8029-c39d2d22cee4.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 0xa1176c2ba01e29cacd17171823b04d242daf1503dbd8861019afbc6e1c3e855b. 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/DEHR30800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03422f22ea7a8ef0f35e95ec51914958343503ceec66e9c72371ed7486c67c85. 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/DEHR30800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6279d04d8b850ef526c37972d6794cb768051c03ef62b9bdcebcfdaff4055c76. 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/DEHR30800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695a72829eb20e76946412604523eca380fd025a0bc0bf31126b37c0aee54e17. 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/DEHR30800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d2b556ac88235b91e63802555f1cc1a3f74b8dcb9067bd3bcf2918baef429. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEHR30800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a6ded53f516b23062ae8bd5f00eac6163d38c16cdc631e97e5bd698abf3413. 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/DEHR30800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc43808a2406f49659ea108c8d187fa5592145f20715526abd447b5da067d9cb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEHR30800004.
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 0x943f79a75ee49923d589274b7d9b6405f13af370dd9e2c3478c3e12e56aae92b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEHR30800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf171901d64c6be66105f2e0408eb3ea3bc4d7a29da0bf7a73919352242bba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTC10641954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493f5f51dcd18779fa0c215d160a3af77068ae113e30c086275f59fc5bf7abca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTC10641957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b73fcef7a6db86ac2d5f1702f33c3fc823382dd5e549af6ee37e825e018b47f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USTC10641952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d94d5e98e11d836b92ffac979b51b68f8b704cd9e23b71d48f1094f4e793c0a. 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/DEHR30800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48099a16880a92c465e9e0b7fee2abec1a6b8dc21c945648fde6c16ff63d9a62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEHR30800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf914bc7bade04850e46a5bb014e567fc6dfa1546bb6cfa02900fdd5be1fb5287. 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/DEHR30800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a87116c2362a4a6cfab944664c946c094ffb7235c26c63bef443baf61735d. 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/DEHR30800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c063aaa952acf920cc8a4f1733ab9897d477565772fd978e834dd2ee66ddb3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEHR30800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5df377899dadb5387aa3d40412e0eb8edc94f58a770011900a5a3ed4c18ccb. 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/DEHR30800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a2939ab0c9a1ef53fc2c48cf06d015396a6612a3efcdc61808e52b33a7ce6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEHR30800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb9487aca72a792952d1e26e49d3aa7c64b740a1313e48645663ad115f620e2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEHR30800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0e396483dfb2b3c4a667e10fa5bbd9da2ca38d9c17a920b7810fee12ee6fa1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEHR30800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf482aba6a492f36820cb39df77d96a0e1608c75fb0968c43e393f4acd13146d3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEHR30800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dacd163ef9b6e6ed9141ad8fc4692d15c5696d94845b5d080971a4506121676. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEHR30800038.