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 0x7214a19b5e91d6c9d2a9cd42e16e15322011c5c336764ddc499f1d63e3a9d3dd. 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/f3997ebe-b961-4e93-9b8d-c26abe1e09ee.json and https://artists.proofprofile.net/proofs/artist/f3997ebe-b961-4e93-9b8d-c26abe1e09ee.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 0x64cce330625b2cd8e304f15e2bed161e26f475bc111fe3bf88fd6adff0a86efc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CZUM72200995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84f11443884438c5b4ae9ffec6849ec60154c6624de71483b3ff80c8eeff73a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CZUM72200998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0960d066c197dd5d17143861ec9b64b512add27167667e73cc2a76db50b02edb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CZUM72200999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad8eb00f3604fbcda8daf62756c7883fe3314aa723ad86a7ddda9a0b4e0966d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:01:16Z), 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/CZUM72201000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6db72b8410afe8e34cadd0d6078022f595e984ae887a8a87af3c26e29ec40e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:57Z), 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/CZUM72201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe446eb5cbb8cfbd4f5b848877ea98c994c57c752df6939e478b428b9bc1ec4. 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/CZUM72201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5074a1ca1e38e3a31afc0538f7da21c37060f62ec59edc4b21d01d41523c4d63. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CZUM72201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e08c4bdf98ecb0aaf13f427fb338ea10510ddb97e5e988caad6ee12de2fced2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CZUM72201005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2443d8cf5aca15101cfea216ef57965fd7c3321465d6b815f525ccf9459b4876. 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/CZUM72201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ab880be49edab600e0d53c12beb6abfa926faaffe19feb1411bdd0ae233a9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZUM72300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c072595eaddb99cc5b95a9f787f049f078e485e5b3465d456d0a7030b647f7. 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/CZUM72200996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043cd1652ea7070098af39008635a3f3536fb02c254f936dc73eb1443d12f70a. 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/CZUM72401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc40a704127b4b90bce5b42d83aafce1e5127d46af48dd30a25476b40b1f8d7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZUM72401053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435575a659238d13c9529df3d9c5190a1bb71f86500c5b589c6f9dff77e01a02. 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/CZUM72401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682b61d9f99ce79c261f8a2a48d637fdb8738d3887755eaa4615c315212d3007. 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/CZUM72401058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf209825c378dabf38bf1df9467b203675a32c3861dd7fd0e67c7e453916f14ef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZUM72401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91baae79231911b4c111115b95756b8ea6711e6cd5f021b86d3130d89c0de031. 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/CZUM72401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded1b8292b3a09ac76060973da921784e058329cc01b92e2d4823ceb95efc0e2. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/CZUM72401062.