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 0xdb2f7f4598d7ec2b267864d49a56b225c1784d050022c3206aca855a2e565c2f. 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/67b0653f-fa6c-47d2-aa00-dc8abd396e96.json and https://artists.proofprofile.net/proofs/artist/67b0653f-fa6c-47d2-aa00-dc8abd396e96.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 0x75547262828750c74cc14c58a533bde094ba7d7f491cdcc639b1b000297d4b1c. 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/USL4Q1871679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c80f95a92a6e92c628caa0c775322ec2637da4d20b30f1aa9b217b65479a45. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q1871680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9554c78ea527bb8bcd24abd363e99bf1ced5b6029506b2fbe59f8df68fdf48d7. 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/USL4Q1871681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97302b79a73605ae03cc424746fe576e5d7a3793ddcc0f745da3d100ccff060e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USL4Q1871682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d16bf594a008d9b87a466ba1b1bcb20594d11ca2ed234d35e4faaabd653ae0d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USL4Q1871683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb82ed8daf185bad45520438b646174da75fa5837f28ef8d197b62ebb58e6a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4Q1871684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc74f5ba93811e19db4bf18adf27bb5643229842d03df0b1452ffca8b4b061. 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/USHM81605948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac2462f546a848fe277eff44316c47a4182148b6fdfd63c7d212bc1c099121. 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/USHM81605952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f1a4f4ff3b176fe18110ea3c5cc60ce3cf002b6f18bb8760abf2f3c9e2fe01. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:34Z), 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/USCGJ2039860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad3ee0ea28b511447867ee787889f7d962e324dbe545fb489720f47da13a517. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USCGJ2039862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8678fde63b08eaba030295be9f1a5c4984c0b6d59bdfba583f58b241cc2c3d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM92146945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcefe6a5c4c1944454c2e6ab0510f28b77a528cded941cadcd3c441bb3c7d83. 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/USHM92146946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22af0bad9ea9c70e106ddfae1197d456ee2e595c25ec6a4f970132ab5f1017ce. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:29Z), 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/USHM92146948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecf309099d5fcc52dd359f09784a30b52254044654fc187fe691a6c2428c981. 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/USHM92146952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa017103a54f35fb519d0b84244465c0098ba2372ffb441d1cb8dac2516800a16. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:46Z), 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/USHM92146957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4da4a8ae9d0814b009b38b103925943b9218ae0011f3a4d8f76c5fbc992e0. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:28:43Z), 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/USCGH2254745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b80295dd0ea7eefef0273e647eae0bbedb4f540846e63f4b290b1d08aaa3ae0. 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/USCGH2254748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952befe2d615769f2cea69238eea62d4744d3163a30b9a3203aee50b4f38b533. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH2113806.