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 0x34329f7228d07c0e50790efa3e61534221a184553a501fcee5689aa5719d0c1b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45acc578-beba-4133-840f-2b344f183a30.json and https://artists.proofprofile.net/proofs/artist/45acc578-beba-4133-840f-2b344f183a30.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 0x593042367952c0e82c8f6a4c1ab69af4e99f5b32750e6f8921783d2f3e49bdd6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZLL92457798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ecaacdefa1367dc28f37842678d05c04e8d4d9fd6caee0f07a0314bc29dca0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNB82406558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4721a83aa9e19ff7a7eb0df372f81729f2c526ce49378c2035b68a233a37d6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZJG52525060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56ca778136244cf2e3455ba75316fa64ea831282d60cb98fb822f6fa325103. 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/AUMEV2514708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4327ceae37e484e19858c8562a234f49f98c92a68cebf420ba70f12cbec6874. 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/AUMEV2518321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cbb39ef050357a7797c66b7294bde50472d1fa6ed0ede282e3f8753546da73. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZLL92574841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b92e59b973f03573dd80b7e4396f1abde21cbd0cd470627f124072b5b360f5. 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/AUMEV2541857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae900fe0a73785ff1748f6ba60ce6f1a6a2a64a0db0c5722c98784dfd3a3eaf4. 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/AUMEV2541952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae900fe0a73785ff1748f6ba60ce6f1a6a2a64a0db0c5722c98784dfd3a3eaf4. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/AUMEV2541952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56ca778136244cf2e3455ba75316fa64ea831282d60cb98fb822f6fa325103. 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/AUMEV2514708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4327ceae37e484e19858c8562a234f49f98c92a68cebf420ba70f12cbec6874. 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/AUMEV2518321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55bbed1ddc9f60b63bd61f95740db8a71ab214e2a33df2c88591a5c3c998954. 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/QZMEV2579658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc947e5da4210c1ecda7c5afd27d7e28a29c85454299b33dbc54115698be0ef93. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMWW2579000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54e69ed9c0972c88bb1bab8fe5e2ba25ebad96b9e040b759af961a57fd3bdd9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USLD91776549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda228ee7729c775943398befc954cabdb152889fcbce85cc6a4960e89952a93e. 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/QZQAY2403832.