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 0x8f521853de4a946192669b511673a0aeb57cdd8a0e92f60f2a46ebc8bdf90c77. 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/21bd5eb9-7f5c-4433-9c46-d50f51e1c357.json and https://artists.proofprofile.net/proofs/artist/21bd5eb9-7f5c-4433-9c46-d50f51e1c357.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 0x493a461888c9f9400c044e380309c071575891a8a08d334cfa21a773677f3ac9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NLZ8V1800411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a6e8a1c095f54b218b7ea15fa5d4996322c0248ca1cac1b2119c49900dd35f. 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/NLZ8V1800410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a90fb4f774b986c8e32f01b415c38464538a5ed58b01d1107822b5f094a7e3. 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/NLZ8V1800454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4565710c718eb9e66b350a308b45e6c41105fbf44774ca4794a990401f4cf16f. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/NLZ8V1800498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cdfac4997329871d98799dab8dc0667277a45a6ec6c5af4a25b322463b63a3. 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/NLZ8V1800950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643f47b4246f700e2437650d5d80843c96f8aaade9c1de82eaf812d64d0f57b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL8CC2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac27f53692d68cec715ba623a8192ef0251b9eecc10f3ab2ae70d9e26d07be2. 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/NLZ8V1800982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3dad8e6fdccd89504ae1f63fded5e411652501396e4c6df1aee2c0854099a1. 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/NLZ8V1800994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8383ca2d34231df4eb5b9814b31503e0565c4a3f51bc542bcff9f57f49839f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8CC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a9214af8436a914f83637836b636ad4e961682ec18e7bd0f7ce4e16f9dc1cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8CC2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fefcd9f8127a1d1890dfe0ad77b2a947bab2d55330f5936a62b5f549e4c4ac6. 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/NL8CC2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b27b4da4d6ec363d1390ee4fb023978ac0f9ea673c285ae4f5ab7e5b04ba6. 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/NL8CC2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3dad8e6fdccd89504ae1f63fded5e411652501396e4c6df1aee2c0854099a1. 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/NLZ8V1800994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8383ca2d34231df4eb5b9814b31503e0565c4a3f51bc542bcff9f57f49839f. 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/NL8CC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b27b4da4d6ec363d1390ee4fb023978ac0f9ea673c285ae4f5ab7e5b04ba6. 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/NL8CC2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974907039a6d01befefd401b8fe9fde33bfb1ffee1806b8777f3758937fccfbe. 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/NLZ8V1801057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3f727948357fdcccb378b799a4db7f5c259a9aed1b82d08be07c2e7c185fb3. 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/NLZ8V1801069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf611cde974495eb879b966cf36f84335dd0cabaf09674c91a253a0c17ba611a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLZ8V1801103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c62c899d0b0cde12f02fa4c59a32ea4a1267027c99fa0d019b09f91ba5086e. 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/NLZ8V1801111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8c365bf18347594bd199faf23f963979548a2f72838c3dfe2d7ad9f5ba3997. 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/NLZ8V1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780266d601ba1c9a677a029c4cb67adc12d55f757554468d08d368c2337ccb2b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLZ8V1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910103845ff53af8ea0a6ff38e99f967a17eab224f93a296fd6627e7e6afa949. 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/NLZ8V1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbb27b0e88529c9ad3f329918a50c80934facc9eb45f4def7ef1db12ca1a58b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLZ8V1800028.