1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfed8ffa73f75ea0f9c60c147d96b629d211fc010e0790e8f36fb7a11b94da115. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a706475-b255-4b64-bfd2-04bbc6051019.json and https://artists.proofprofile.net/proofs/artist/7a706475-b255-4b64-bfd2-04bbc6051019.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 → block OTSBitcoinBlock must exist at that height 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 0x3068a96a5b114ec7e7dafa842687da9b13bb41025a4972f99da29436ac96b17a. 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/NLCK42505641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1f7c42602bf0794b60e6865beea9bdecd701bb83edeb07a7112f2fd29422d6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLCK42505642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c87bf7fe6581654e4f1a0a341981cc15eac9e3527bf9e4848121453486174. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLCK42505646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f16a585d701e8d1dc14a8e54dcd9ae160f2cb5e60b3cda118947fd20ed9ad79. 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/NLCK42505647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bcf66c304bb9b76db34051785dd110315232bbb353df002fa13d1fa43eb2ef. 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/NLCK42505649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954fda388d618a9d3833953d5835e5e9c931e4bf9cda1b00c2da3891b179bfbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLCK42505648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad00cfe42a13c2c3b59a71729607d7947cd65b024f87ede20c3f0f2d06b64ece. 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/NLCK42505650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21901409268b7013ad140841e817e1d8e7cc1a5ad6be43534afe859e2d1d4683. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52431544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6f244daab2e893fd011e46a144bca3b9048bd7bc7c183ee15ed54f4fa4f2d1. 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/DGA052513618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041a73251d5252e021540e2e9c2c8ea3849cc3c65be464bc2fb5dc87c60bc01f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEH742333831.