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 0x1fb8421528eff3556896b86b3b6659bf5a426d9a7f9a0b16d70858720b4904cc. 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/2d69f9ae-d8ac-42e6-8961-1536e4407ca5.json and https://artists.proofprofile.net/proofs/artist/2d69f9ae-d8ac-42e6-8961-1536e4407ca5.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 0xfd31d8633753623e69bff24f11100972830aeecb34a5b69e15d4e69893e073c5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBZ72000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ab856dd626ecadaa439ba1244022a606fc3da9012dc8ae34fce33379c0754. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHNA1966243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719a841235c472682a4b8df81bc3895b8ff4c4bc02f0e7ba79a96732d1cf29b9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEBZ72000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71958fc7cdc5bbdc6741b7f594c28994c044ddc06768bcdd2d4906bc3d9cbd53. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEBZ72000332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5058957801437903f1c16d8e3b6aab79108958bce1885b295733c1d14ecb84. 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/DEBZ72200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab1bb790431db36a4cba47bb7b6cdbe21d6726a527da0e8b230c018e01052a. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DEBZ72200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b6ac980e5756ca4ffa29f03e850b211210defea9428c6cba1325a5708ba9d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEBZ72200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5d5e4efbd11efa8c7c120dae69e1ace67a1cd958f261744d7dcc762dbef7d. 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/DEBZ72200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd725134c7e9c304456d40787b64a3d0ce3e1125ce54004a8c776bcb81b46ec7f. 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/DEBZ72200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e01a693b97bed704291f9a0d434350cbe4984d378bcd941a5a8fc1280b985c. 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/DEBZ72200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353ed67eff041ce494c60c5aa6195396a357bb036eb9a3d1ee5eccfbcee2705. 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/DEBZ72200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70415861144c2a80314a52f229e934a18c49d459173be97beed501a4fc6496c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEBZ72200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4fc78c529da9f0f465319a39ea7151a20d4c024e55767582569f3483054f7b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEBZ72200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f2cb0be42e01181383bde3a018e92f0642ce914ab2658c32597775affd4a2. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/DEBZ72400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701153adaf78fb7b9b7176c172b1d86fca39ce954d41c7d6ddc290566fd1f791. 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/DEBZ72500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2878fcc2d6ce6031151ef22ce9d6e4105a4bbc149e023698bb3d50182c46de4d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEBZ72500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f2cb0be42e01181383bde3a018e92f0642ce914ab2658c32597775affd4a2. 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/DEBZ72400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52659f5f33b442ce4fee1e62b32238d835026b1b17d2558fcbd2980e4c794ff. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEBZ72400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03325d03101f35474a18d41d2e772ffe88ec3a8a06bc7eae58d90f3369285a29. 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/DEBZ72400094.