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 0x7b187921adb6243b73e2dc107e75538a4e55a8a160e2337337534df25f2b6976. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d268e10-1908-4ba9-8783-7663272b29df.json and https://artists.proofprofile.net/proofs/artist/1d268e10-1908-4ba9-8783-7663272b29df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fernwehgedanken / Salzwasserflaschenpost
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 0x17b21bf73c1ed090aa5597e3c2d3230b2c3dfe60786c650b004a91c393ff59d0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEQ022118271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950ea5c65452f24cb359ea9169f2a2f3da6d32735e3e61b83964847ece5d92cc. 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/DEQ022112329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ddb0d00999d9cfaffa85789b8d0afc9a1906831dc5acd8b38d9842b2096503. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEQ022112327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb02a337bec72800b9831f4eb02fe38f75e855b4ce7d3713564be239e74c20c. 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/DEQ022272749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c91adaec146cbf6455eb06b1eb54318e7c4aaa664a59894a7a56ca079cec5. 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/DEZC62205025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fc8a4f152c0dd2e34f65722297a46c3a0e9dff8dcb4cdc38650e6e6d2db4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH7812232956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59675f7b5390bdfc74a76cefa1da95860bdbcfbd0eb028ca254dddc2dcb88e. 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/DEZC62374625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6024a73c684d85f7c2e00f14e9d5e897316504ce2f07ae559848013108953b99. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QM3DF2481986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c9f061fbc3c08332dce3ec7ecdbb6f0c826992b811d7baf739461adfc0d1c1. 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/US3DF2501426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7741c3f9b3783181d9f16a4a8e7a19bea360d1e18aab1bce956c845dfdf14f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812530974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6ecaea35181a414646b1707caca32c62a2db766e89fa6a022f5c1bbe03c51. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX762534033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1060f76d76889a1cf9399b913f6daa99f2d78a74d9a5ee26b6edd9e63aa20bc. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:33:58Z), 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/DEZC62504975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c2bb7f82d3267ae29bbc28c544dc953169d849d56deab90cbce93df248186. 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/DEZC62363738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f089a8151725f8697c25e02fcb6cf412a5a616968d316ca7c8b115afcbf6ae. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEQ022111420.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch