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 0x8b53772880bc6066b45a4e3997645d308d26da542309608ac79849b26518f1a0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fa2feaf-6bc2-4742-b3f5-8d8b3476c3a7.json and https://artists.proofprofile.net/proofs/artist/7fa2feaf-6bc2-4742-b3f5-8d8b3476c3a7.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 0x8b30284d8b407f126a58a9e7a6dcb2d2cdcf73518ae4f8842c48cb01556d5588. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NLD321600524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6990ad7562e7de8095a68ffd597947a10a73f0be83a207fb5f4310213efd900f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NLD321600525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0de496ff3546baa87fbd3c7115bcfaab93b4c5950f8196568055ae4199de604. 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/NLD321600526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247169dd34d6d6836202796242dafe54e932ae4e5a6cc4e16731ed395b9a9c33. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:23:08Z), 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/NLD321600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062d71ab99d250841359c90361d21223a8d451fde3b08f3f241a78ea2aabfc8. 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/NLD321600528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53801888123b6ce4c613cbaba3a7a3e8319556231a9ea3a60f31d8f160d14dfe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLD321600529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0eaca1c65307ee802a5794708595af250f184b36d96b7da196ad9ff75e93ae. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLD321600530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff40f56a7a2499b5643ec978f39ceb9854c5ac22a908064af1d47be24e39f3b. 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/NLD321600531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2235e5710fcdfae3d0409cf023d40bd3465c33f1900508069e489a521fd155d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLD321600532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf4c95361c3840c8359a32054d2b25cb2e7c7394bd7486c2884c9b58847ef64. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLD321600533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced348264232a8e0ae876c5434df927f2c4fbb40f8fdfe5ce6cd084b8c415fc6. 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/NLD321600534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c137c74069d407467453503c7e237fcce1c2cb353c6810699408768fce5b5. 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/NLD321600535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20b8905983d8d9a7abbeeaa78c5d06fb73c1c41dca7ee0390bc026012f17f12. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLL6R2100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252992ec02906f226ff06ed59ce31ed82fb5fef66e56c7eb236adcd1cbd0d988. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:31:41Z), 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/NLL6R2200599.
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