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 0x3d8ca2e718777de10205a092a2ed7aa11edd91c6375e7eeab3a1cff0e50af2bc. 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/2f903ca6-6e30-4767-8ec0-1162a67c7a21.json and https://artists.proofprofile.net/proofs/artist/2f903ca6-6e30-4767-8ec0-1162a67c7a21.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 0x97fb1a19bb8965f7aa3302341d7488248fb9ef21738f217878c1b4dce3d2c9b4. 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/QZHN52165055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41a24fa804e960fd7eb41f2b4750463fa3f582139f488486b85a2a36cd00f2d. 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/QZHN62140614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08979c0b78463c6db6872bd951bba136149845d824b74f713a0fee45960452ff. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN62140617.
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 0xa9679a9e84337cce3449ab3b8967d1e7bbf7b1171bcba13ecf19955a85ae4451. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHN62140618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b36df4cd998564c539a706285a51602402433753bec69e62c0492673240b1. 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/QZTAS2134366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f9c8725d8ec212dff98709bd3e4eec8852dc486bc2db587ca3d0010d6fdf09. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN72247696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d4252dc5863bbe6e33b86317ee0459e25a0e6bb272c256a9468b185141b33d. 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/QZK6M2282927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0668ba6e293d309a0b3e8c2757f6718c5d61ca351fe290be3ab6e592e43c158d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZK6M2282929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc926481e1c40732814960af855e5066eb34f17ede864f8d135c72230a699665. 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/QZK6M2282932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b669e0df2394d30e4265002952b2b6055f58a17d75b4c3dfe65dfb3bb09f2c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZK6M2282926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e2ecda9be23880bcf6a72a49e810479479789521396261d2c7ccef292d390c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZK6M2282928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ac71747068c685dced71a4f75ccc63ea6c6014db8ecde1dd05a7e7453a9efe. 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/QZK6M2282930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758ffaa6fccd9dfd2f5808d95d419f10732838df617444d6fba60bb30be1660. 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/QZHNA2360273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c026d742a453561fdb27c91a62789fab235a28b77de2fd522e990362dfc2e3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNA2360275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c6c2c230171bf49e99fe416a16c8744f7aadefdd95467ed8e5a9a8e8062e23. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2360276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44338ac212939e65b390258dbcf3cd6a3adec4c22b65867d0ece73e26c32bf02. 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/QZHNA2360277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5a2324358e2dba87ba0b19b8f607dc69918c9c147656b9f2468f797f79b679. 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/QZHN92389071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5963007d660f5d6b94ac330fbb893881ea65e291247191ace64254f6dcfb04. 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/QZHNA2307953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ed914307425504b913e4dd986bdaafea2fefea02f71c764c4318c6c41d406. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2360279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853f478169053b04d5874b1a3a5773490c0d2874233a6ee41ac1dbe041f5310. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHNA2360280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b9eb5a3ff569658a50e72cf01505664c3f3c83a1771795c108e68ec3f8aabe. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZHNA2360281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330a1db7d2bfe376fb8e2ec5a2d8eaa8b51579ee1f7416eeba2cc1c2f9efdfdc. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZHNA2360274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345bc41dd5559f74eeeb76de0dd299ca61b1b15e6cda94744e94231c24724b41. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNA2360278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32255974ea5f1d7b0947b165543ff4c362ab4f51f5a9b0fee5d907fcddfc1243. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZHNA2360282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebb6651e7ab2aced92b93dc5216f2b534a10ede885b4059d8d2763aa36e6881. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWY2403291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3896c38a76be58de19f2fe5a0b3c8ea0a35af61c42389f8eec2295fd2fa3a. 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/QZFZ72513407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2ca4b9868d96b5c02fb01500cccfd46fc5a767617724abc301ac6313e81ef5. 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/QZDA72541286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4306a7d87ffe2f868d445da9aa1472d681347c0c94a98c9b7568c39e59423af. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZDA72541287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccddd0d7989fe9132f7e869a9aaefe88e5d0933b38e70ee9014f9dec7893148. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZDA72541288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b250b9f6a86a5d993010ea22fea765b6b62c0fccdcaee51ee1ea6439443d39. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMEM2511971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860b1fa18063ef590527a7abe9460764f7f72e05c5295922c855d27d310976e3. 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/QZMEN2510607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f6350bce31e8dacc95bdf7df8b0c68a3791fe63cb7fb3303febc3162486a68. 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/QZMEN2510690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780e88701e83e195fc6087503545edc257423eeb6734dc9cca0b17aac78eee2. 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/QZMEN2554573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9eaecdfa2de1741c1a165d49f4241d55274d305fa1567077b70999b01b2a25. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:10Z), 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/QZMEN2554575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61420ec897b5140db3d0d6a03fdca6a93304c57811ba68d0ee29697e2394e12. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:14Z), 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/QZMEN2554577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eac5054b3b7da44a25369a701c56c4dc4b376cab02a8c57ebb42637b2538cbb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEN2554578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c745a7391f1d89815d1c7d8f120866abf9649850080184ca5dfcbb170a179. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZMEN2554580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9354439832ba735d8b4ac74a960593e8636cf6dde30f2d5e04e7cf1c65c59e9b. 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/QZWFW2535824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd181a8af3f7c04cc2172afc74cf8d7bb9fa6876964826957ce3defa7483859. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7S2522027.