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 0xfb8a3a702127090e0831e8d8ea5f21a4e74277b6a1748ec26a7867198a9daa19. 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/5b600d6a-8189-43f4-b7c5-79651f728fc0.json and https://artists.proofprofile.net/proofs/artist/5b600d6a-8189-43f4-b7c5-79651f728fc0.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 0x1135293e5424ea06e6bd3f48d679199dda03f32dc8ecaccfc11690f545bd69c3. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCACN1616967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e0d3188b65d8a0d58b0f590cc6a9c687265c383a40ce6768ece17c54363602. 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/TCACN1616965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb12f9c8ce9e8f01cce3f12336fd7965605dc4b5db5680b3332fe7af2bfc4d3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCACK1571295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8655ed09ece6498cf38eb6a38a51f819da10989af3500f915d24ca16b762fcbe. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCACK1571300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ad04a0a63098e56aea26dc430507a86f8edfdcffb3a02bb5bb75258319375. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCACK1571302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e9d9feb0746c4df4cf865027ed1ba8f043b68a419c9d175b5782c40ac053e9. 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/TCACK1571303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28c8f6eb74b1d166feb609dcc43f90e5e766b5c8c6ef241eabef817122fe86. 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/TCACK1571305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858af3f8d730a9080c38602155d558b59847c1dd228c09efd94b759b064d6a8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCACK1571298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e74d4a7038ab48d5e1a14b4ced00c859ddd49e2a3c6267a2a669168a1e31e1. 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/QM6N21736055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d0bba5a108f801fad3da1de39ce66ec6f3adc89d6c677795beddbd7e20ee23. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6N21736056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87bea028d1692f7ee7d3764fd08aec9f1029eecdda9cbbab9be37436660e8f1. 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/QM6N21736058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da99859f339584c4ac60092afd6bf77f2796fd20bf82ef1e4a8a351adf919b7. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QM6N21736060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed86df97d3847c464edea050c080a9640b9eb81e2ceb02995dfb75739223300. 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/QZBRF1880712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba0cc019ae177597ca8d5b37b8c1f1d6d81cd6b3e897eda194b6d110062029e. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZES91868816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecdddcbd77b47b196b9a3d9e9abcdee1d02d0d21c5b87b2f71921a372a48850. 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/QZFYZ2090134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248d4a12002001db4dcb73a114060f408e9007af06b811b49c0db9d742024691. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ42079372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c534bf9c9649d0345991bed2f8700dedd50dd95d649faf5477c36167c205e11. 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/QZHN52085689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c98d022c75a3d4635837e592bf76d104b3892dbb084b67aac8a181b7191299. 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/QZNWV2086820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d52bd26bc28fe4f89936e854fadda38d42f2649e3809981db2642c617dc922c. 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/QZMEN2191832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d09b32877c76b7a6d946034ec6586a597425fc378b012c436e22aa08d829bfc. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZRP52128031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92de1c9e156b49f040dcf807b33cf2dd6b2bdbad150376e4322e10778d62b92c. 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/QZDA42209170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a44ddb487a3d6ec6a2e4f25ed19dcc2aba09452dbb7fa963c09d8cf2ed580c9. 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/QZES72340374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88602ce5c2c5df96756e7c815b89ee6c62f40bcebdd6c5be92fe2eba6a6bea8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX872368155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639051a99c79fc14dc75f43bc60478f3462e2d49ef854d2ef246f9272f00176d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNWW2345583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18b0892ad69c7f43a5aa9bb1cdbada866e34bd71c6d6da6f85c9dceb27163f. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZRP42309940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8696915905f198f5f8703c71d604c45ef05786a14f4221f704a7199624afe79e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US3DF2547621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe981d78a56be4df3e996da17612e56062069c3daaf9a03029c7fba688b9e9cc0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZPLS2167116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e90589c02abbccd4d26b8fb792862eb3f9b6528727f72df7915c719b2f26ab. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM42K1813648.