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 0xa0a49a2d53bfc1bd2f2d678b2deacfc511b9fdc311bdfef726100d6e6f4a4965. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e06322d2-0c77-45c3-9acf-8f4e68dd5d77.json and https://artists.proofprofile.net/proofs/artist/e06322d2-0c77-45c3-9acf-8f4e68dd5d77.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 0x512a0830111ad557cb661b16f5cc116bc5de25d3ed4cab96b756707a3caf2bf8. 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/ES71G1866451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d97c67c19e892850067b559850ca434aa375f30807ef922ad045a28361095c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES64E2306091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e0dc45b632d48fe069c54273cc897a3b830beda9c660d416fdaf2ca98602f. 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/ES64E2484239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9014253e5f478bcc8632e50abc6e806757afbae31dedbfee7fd0f5953cdcf201. 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/ES64E2484240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d97c67c19e892850067b559850ca434aa375f30807ef922ad045a28361095c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES64E2306091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b6cf371326064299a7c84d0586b2e6ee099cdf9607cfe2dab9bd6e9f35d138. 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/GBSMU7580093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83016c58212554a81324422c9fa3cdf500dcd96b2c94f037b69c85ea5c91664. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ1845820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc032a1ec3f114590423dea2048b6f3f2fcbec076bafab43b3a2edf0569f0b9. 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/QM6MZ1845821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c40059f1cadcb9617a29442a8544c9aac30d1dc5a94be301ea665df9e5e81e3. 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/QM6MZ1845823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b90fb6d9f02363a99c4c39a4aed522fe2ff594e12041a1bdb069c1cd2e7b05. 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/QZHN72333507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f851810459c248c4e8cca45d2296a8cbb70f083b34200d0f87f0dbd70a3870f. 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/QZES82320207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a6fbf57729fbc609f73f81252a62defe89e6f5e10265ddd63c37cb63df490. 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/QZHN62294348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3970ab0abcff2a81c79b278200df7a4614c5515ae132c4520c1bb3c0668490e1. 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/ES71G2008664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcb19cb0ab621d9d3ef7c3b2fc5154819cfcaed7783c8864ee982e466c64a21. 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/ES71G2008665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccfb8910f446c6d9a57d39c64431ca32753d9dcf92c5642af53fc6947342354. 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/ES71G2008667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd187ef362e95828f4f6d28409d1fea6b816608c61e388090245097c61966a75d. 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/QZHZ51978521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8d0695e83184a55c0f8a2103aace5ce76efe37c1e97d6e45d3fc9d565eb60. 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/ES71G2008669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc73aae34caa9987ed80037ca88c51355d3c835636ea634868edb3c32b6e67d. 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/QZTAY2223184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f851810459c248c4e8cca45d2296a8cbb70f083b34200d0f87f0dbd70a3870f. 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/QZES82320207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc600f7e79f76afd0e889a62ae014547500c741476b8a075b61f71a5cb8128aa4. 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/QZDA51853874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855498571ad0c2c16b2b01f3fce3272708b1731110b4039a0fca339b28409622. 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/CH6542148527.