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 0x210e821208180f6e23af6fd695c3b957639bd8d509e99b27900462114d22b9e4. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0a39c4f-3d11-4115-b9ce-506ab1d10c95.json and https://artists.proofprofile.net/proofs/artist/e0a39c4f-3d11-4115-b9ce-506ab1d10c95.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 0x7eff26952c67eb3f6bb75d13c707229a1a16ee7b7b4242b68a44d7d661a36434. 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/QZHN91938444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff4b252d98a54d60fc2626b6b0436080d77a176f137265fb881eeee9d63384. 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/QZFYX2074387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda74aa6cdba5ec8e1d46feac7ce608aedfc471bb5562cfd9c416cd8056acab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52031320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda74aa6cdba5ec8e1d46feac7ce608aedfc471bb5562cfd9c416cd8056acab. 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/QZES52031320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04307eec140e5e8849450a98003b1349189e6ea61f56e0190df7c8bc53969133. 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/QZDA72444702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ed91763143d80f7d8d57c4cfbe2f37ae5a002298bdfe0e4072b6917f6f187c. 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/QZK6L2243524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f32fd01c30990d6f3237abeb1a56ef895fcd4e36bcb3510e454bc73e684ce7. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:50:10Z), 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/QZWFH2496287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5227a654631cab5e231bfc5e9b94bce690f1ec4fb2be6bfb30bada37ab0e472a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:36Z), 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/QZMEM2542302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e794db4ff7e7a8f5e2634fd5e29216b44e9f6fdbf78d6764128216e743db7b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:04Z), 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/QZMEM2542304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8941d2e09658131b945f38d3c9b4d6463b7b3424506f7d886ccdcfc85f6275. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2542307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb5ca354353f599ba97493842423f298cf46a7a1adc3ea6911005494b92a4b2. 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/QZMEM2542308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4710fd99b11a677b4105b71b92d721cc72bc2419119b0ed5232645d1b8c400a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEM2542310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c205f6508f6eabb3cc586481069bfa5085288b46d54f5ff0559ca44238a28. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWZ2559196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf16d26bdc652b406aa4f267ba43848ebf4454f6d9161e917416e93bf0d4f62f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZRP52565986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a83b3ac34c7ddb2711dcd3a0aa3a89ad5af7b428ef261f04a5a2dd22d663a7c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZWFP2531262.