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 0x3d5e6b231a1f734a6b7562758256a721388ef05f23c7cbd62453ecee3fdcb31e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b2eb821-f82d-4cbf-94ea-6bbefad2e214.json and https://artists.proofprofile.net/proofs/artist/7b2eb821-f82d-4cbf-94ea-6bbefad2e214.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 0x615162b7100d78d41f21e550725b3df603894a5aa05f1a4832f333165d015a62. 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/ATA980600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15d867c9794ca7974d6e6b976b2ea23824579b8adbab51e088448f122844f2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ATA980901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf071a74ee2bcb25de72d603c9255b2fde0f7a2fe135e8a8b327f7eff2f39b6f8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ATA980901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca8333e59f17c99078c240d78f1b69ef10ef59933c9f2a0d18f1b2b8350a984. 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/ATA981101311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356255ee4d7ca2a5fca89502c2ffca5986b64a7167ef02e20cc92c9ffc70366. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ATA981501903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54268f33b9fe0694df159a5afe6d7f2bb5417affc863c6e6cd840244a8da4081. 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/ATA981501904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea0e6b1ea14f32b7cc948bd34fde3785adcca82bec3df36fb5463b90428b6e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ATA981501908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7a32e1f07ced64cf4148c5aa1676c6f47ffbb0ece77ac0ce7343e028d8015. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:44Z), 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/ATA981501909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79ec92e1d9305ecc0bea3caa0a111bc7ee13be6ca0f46915881d27d96c117e9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:42Z), 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/ATA981602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dbc65a55ab7659df6a24b71f021c7f4854b2de337d1f14837c0d626cc3235d. 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/ATA981802401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511c04c4d0eb15e4088e07409bd13366b6dff76c828f93b75c38df8f923851a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ATA981802407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b86570da88cf3ae032a172a9dd463aa585613625e38867bd6f1406cac40d16. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:47:16Z), 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/ATA981802408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f86fdaf842c2318fcc20a98b772ec93524c2419573e46bc4cef24a832076a3. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ATA982304306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca7798d87b6bf0321ab023831232fca012bea228d45f6734c65a53e39778a5. 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/ATA982505008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f4b9d113c08664510d59fbc66ddd95580b217af596709af2332afc292829f5. 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/GB2DL1600004.