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 0x3e9172e1027cdcd8add386445f1e1fab5e34afd6819c0ef1714ecd976a68be94. 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/4932693a-b0a3-41f9-9dce-737047d18392.json and https://artists.proofprofile.net/proofs/artist/4932693a-b0a3-41f9-9dce-737047d18392.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 0xa6f95bfcd03c3c42b6b9b2ecd66f546aeee21fbaf849535dbf7fd699f3283804. 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/IL5841514344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41baece548682dd70ac90a4f2cc14e7bd3d2b71c2910035b7534cde96e33c03. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IL5561300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e520045bc96a67bb2e7b93e0e694cb7dc93f60d3e8f6c28572a6932df3820a. 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/IL5561200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a1be0778d9d720a94c22c6eb95ba1bbc01b52c491a560e2f5d368aeb8189c5. 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/IL5561300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127440e4b7e376810bbfdde0961fb955d0db766972b0a715c06b4667ebb1964c. 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/IL5561300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dfd411755050661e9ca5ceae0c5ba2526c6862f9abbc6b2131c938bd8ee83e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/IL5561200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a79ca10bdea5086ba62f28dde443f8868023d182c2affd5f73f0b0eb98dab22. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL5561400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe037427f4c89028ec9366354944b583549b706186fe3574bb8f7643f4237328. 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/IL5561400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e1a4166d7e630b093153d50fa3032fd4a40ee4758ffa687988ed4329f8758. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/IL5561600099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a827317529815f6374a27052bcc5f05bbb6221e8fae112988674b608ad4a06e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IL5561600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d9ca4dbdfe2a21eb024adae4e3500dccd995759bc744acfe92ee08c8873b1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:14:57Z), 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/IL5561600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97292e399ac0e35693b305534be6837a5d7d4625b7ee8b5ac00dfb49e4bf9005. 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/IL5561600115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a2e5a48009a51d02e18d9812c333b777391ea4d83645e6a35914edb4c40256. 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/IL5561600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd520c9183d766d320050e57f11403e706782bb8b193cfca4b0072560b42fb202. 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/IL4431700841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebb6e24f902aff70e897409604eec32fb418251c47862bc5f349815f3aa8c0c. 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/IL4431700955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177f0ab952d2071a37cef02a0076e0c7827869ae0f48d3313327cde6ece7260. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:12Z), 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/IL4431700961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205f4d9faa6cfca207851dd3d1b91098fc052419b8e92d0e4ddc4703e9415d3. 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/IL4431700863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d90555482659f43d3b6e27c0085e911474cb3e47655c494a9c1d99bdb3b9a1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:04Z), 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/IL4431700884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fbccaf2d070d111c377bc5d03202dfb0b4a29d3fb14891afc06cad9f40fd9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IL4431801183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06c51911981a8f662506a181b09abfbecb58dadaa39421dfc300810dec00835. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/IL4431901186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c69b5d8e31c4389a0b9417edd6872c6ef2fd821c54d6d6e8ce5677616ffacc. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/IL4431901128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ae1b53442d22695d87fb47955e6148b217d7441e72f872e4a365abfaeaea4a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/IL4431801303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fbccaf2d070d111c377bc5d03202dfb0b4a29d3fb14891afc06cad9f40fd9. 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/IL4431801183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ae1b53442d22695d87fb47955e6148b217d7441e72f872e4a365abfaeaea4a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL4431801303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a68bfc80899ac8a48dd63ef5d8b34d0c43870e1b63d1e9a6bd023ec1594109e. 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/IL4431801384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d9c1ef8d1a06929db8befdb32df419fe2cc506cf2e9a206eb03b7587f103e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR10S1975458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d1681b70c6675342693ff6f0d823adc4cf33806fa44f33720ecbb47857344. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IL1012000435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fc6e0139f914abc0e32a0224b3770c8297b7f86f8f875edeb7a9f1463b391f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/IL1012000808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936224443077122d077db2ce2daac54026be90d849c0aff019e57f3ddfd1a140. 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/IL1012100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905a9eb84b5e2b2b848528be4212de02198d085818ded2dd3642b94fa779cad1. 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/IL1012201220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f98c374db8ed738bd5c728975913dc2e5635ed09bd2e18f66043deb19973d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL1012301998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc730748a45bef08fc05822faefac7f2dbf10712819f93630f8b8f0765cd3ef9d. 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/IL5842238186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a4f07e8ef05b4ca670deb10a414249561336cf2bb7668e92c9911ad19a032c. 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/IL1021508561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d9f39d811fa2c00bb4b89fa2768ec8532697efd62ef44d7df896457eb27e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL1042106207.