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 0xbeb4214dbbf13deb775cb6059b996a98d18c4da2e52c9759423940633a693751. 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/f0e68978-7403-4552-93ee-0a1cb34361cd.json and https://artists.proofprofile.net/proofs/artist/f0e68978-7403-4552-93ee-0a1cb34361cd.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 0x023b8bbac86d5254cc96b681b2a9cdf86a5c2e63bc24f0013a4fc20012e27acf. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:25:13Z), 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/QZWFE2333089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5699e8529d9dd28b86ae254f74d99e22b56e0390de37be349901c98853756cd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMDA72314215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3cbf3f62fb1912ddcaaceff949a9cfd09772f97d44562edfd77e5898444aab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2315231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695074b41ac1b472426f13c08584a02ee52203dce25dd75bd1b941d6caa82ba1. 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/QM4TX2348609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85cfcecf84f2d6ddf94ae70d521d95fb03d12823168bbaf9f65c5f2d60fb41c. 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/QM4TX2329912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e82da9fb01366c918d05e5d897e7e4f6a79ccb660cd8f4e342a57b3ceb6fa9e. 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/QM4TX2302645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6171f87451869a58406eeae2875c18cf76c06bc063efbd9d751b3debb8635. 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/BK4DA2210049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f98cb0e3aa8d78d13ba9f15c51c93e656311477d26910ce09c4b321d084e9fc. 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/QM4TX2249050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633d12fa76f7da4675ca201aa0bb713b5dda2ddbb0604206949597dbf7118821. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZZOPM2229398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb197d217842e7ed730e78276892f442e0e8a520331c21b427886ed3a4ea5af2f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TW2240800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5930a7e5fc0ccfa7f087d5fcd2dbaafd37befd41a9e56845bf593ed44fb847. 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/GX3Q92020574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f635ce21873352e0f9f7818390ae5c77e46ed384655267ba7ff958a18acc99. 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/QZES82102066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc3379e2a41c299c65e6754dc5ef28058b83c3a8bb41cd260693843494cfbd. 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/QM6MZ2169590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065c849f0646d4c9f08edabef90a7e8af28011c75c6f8bf2194a45045e6fe61f. 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/QMFME2082155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac16cdb074b255298e3edcfa748734f2703d70fe5fb0b92edf39a8e517cf16. 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/QZNWT2026713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1705b97c7d523a6455ec3a72db7885c30a4e362d8aa250ddc354a88f2093825d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2049107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf625275ff713e8ce31f6c5c853a98f0527b7eab27727df99344688b47a6ecb. 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/ES71G2054768.