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 0xbd7fd48600db952325ac421d0479603f05e3d9f6cf31804eebdfd1a63eaabbca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0e4ce74-4ece-4851-902a-31ff28d31c8c.json and https://artists.proofprofile.net/proofs/artist/f0e4ce74-4ece-4851-902a-31ff28d31c8c.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 0x582c75c4660174596f05f43bac7c96041a4f3069b459893f5b5afec10b036747. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US9CY1500713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90feec43e556218bdcfc13b25d2201bb5ac932bc8a942ab788009de95d0039af. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:46Z), 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/US9CY1500714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46d20150ca91efd27576c9dda5befb42f02c75be7a10ff678b55cb9aa603389. 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/US9CY1500715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b18ff17749096b03ca88a67d513c8c9f528c26e06ab2e86970e1ef90adc45. 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/US9CY1500716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5253fd98b76d3bfa5ad5bad70e587b6c6dfe44a8db82b181d45b06eeef2cdb2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US9CY1500717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7202c659ab67cd559a7f7afdbe7cbc2c0b404a437fe93c3539678ec06bc8f2e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:25:46Z), 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/US9CY1600788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8f85e9b5e94e9e280099f522557618c130703561bae6c046826e10bdd95ada. 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/US9CY1600789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952769386d315ec7d14fdcf9b4440a06fe8e7eab50ec6fdd8392f62ac69b554. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US9CY1600792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654a3d0e6b9908f38c9dd288a1e31b49a15d568aae489347e44bee84033edbb. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US9CY1600794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc31a6300299b809a166c4aa9c215f8c290256f582f6d8cc2077677758864402. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:25:06Z), 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/US9CY1601013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a52dfb9fe4e800c6947f50e11e15761fc618743aff4b06d364da10ecf7d4a64. 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/QMBZ91664131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dbbe97803055837797d8bd8598bacb8bec2e2bbe6b16ec44cae8bc2c34dc0d. 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/QMBZ91664133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc828b4d6e276470857b8e4def9e8516a2e7659fbfd6e07c9647aebe3b78d33a2. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:48:38Z), 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/QMBZ91664134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa051295f36b5d892d0fe86d31099cdfd35dbeaf443f30d8f8932169f42ada37c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMBZ91664137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360cdc67a9f123249b35687aed80eeaba26efe92864f96e90fe2637a02e3ed65. 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/QMBZ91664139.