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 0x6540cd2b878404a0b934920f5b1641a34e95a633876c36a3ef8eb6fdcc7a1c21. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfaa6faf-9447-4eb1-aa9a-650bbc2e7e00.json and https://artists.proofprofile.net/proofs/artist/cfaa6faf-9447-4eb1-aa9a-650bbc2e7e00.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 0xa7d9554badb605292b5b7f5a11d21164808cf3ab80a4bb97c96ea91ddde65b62. 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/SE5K31800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4227fa72db35d550c73e25c9921221cd3a0d59926467efc514d574b7e83814. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/SE5K31900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a61b4ecf374ed2face14a92dd3fd98bb5ca058bb2d5a33e1ff611f520e9c173. 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/SE5K31900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1bf2e7514af0cee295b147a14d1efdd3df54108ef8f145b62d2ef8de8098e5. 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/SE5K32000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7051d3308b67f8169e95c7c8baad133a4c482eae9502f6536d37c2a1f046b0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE5K32100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9085b7a97def80d39aa95d72cd2911414957cb89c0a10369f36fb865637adc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:41:51Z), 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/SE5K32100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cee2afe25d6e5f512972c8c64146347277f4080b81eddad1bd7f6b5d39aa63. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:08:23Z), 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/SE5K32100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed268cfe9963e199d37d82986ed272e363801cd1d2bbe9ffac99adf84cc8998. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE5K32200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aaf4880aed3c41d3af6f04bf18d1a6778d00bbffc31ae66051ca327a95c81c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5K32300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c08152160c3dd2a02debdd90bc1e663fa48c6e167719d0af813dfe32d73ae7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5K32300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6c54df93fc078e66a3389fa06b39fd00799b2e2aaf370a4e4a88110e9fc8f4. 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/SE5K32300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21241f565c8f4d1350612d6e9b0f4716ce8712276baf6af7212654f40b441d5. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SE5K32300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7522820937e314b0f9a5ad03224f11cd99683a7e2803ed5b3bf28e4f81b7222. 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/SE5K32300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8ffedc118da03fbb2b00ee415e7d14a5e36b29c35ce8e75645b82258c03a57. 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/SE5K32400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b1beee2fd29d6b6bab18915cab39580c04b64b31c9779a62f2f656b2d3920. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE5K32400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d6a748adf464dc60f0f715655db8ea9c119e165aba794cfd2dbd125d3f870. 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/SEBGA2202870.