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 0x2a77447746ef2fa6b2bcd7d5294d74c821c0c01f742b124ef75e36bffbe6013f. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1a689aa-561f-4889-90f4-35a5102731dd.json and https://artists.proofprofile.net/proofs/artist/f1a689aa-561f-4889-90f4-35a5102731dd.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 0x193a25998d4ada5cb1e045fad01e69122c06f7cd8c82f5eef2ca894d21a17390. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ARCCT1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f983bf54a03b66155c1a998816fabd0160d176017fa4c428e6084562af9ff59. 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/ARCCT1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cdd194dc39dd663ddba93e0c6d073e2c3b39ba4fb7f9ed16a18d742da8ec05. 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/ARCCT1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040783501ab2c4f09104ed570828a41b9149e67bc76826988b03968f0fecdd92. 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/ARCCT1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc228b9e265cec041d99ec46a6c13fb08d51b4c0b57c46e55a3a989d6a398c4f8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARCCT1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6338ae8bd32e764a95fabea75546bb7dd9f70c3d1487e9192a0fbf2b59a5f0ba. 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/ARCCT2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1777953856daa8bc1f33b736f78d53041b8310838f584919b3996c6289ac2e9c. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ARCCT2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd093dc422679f8232af8a5339e4e532e8787ccf48ee65d9108de4aa95b2db7e9. 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/ARCCT2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ea2cd9527fb509bdd85d32b0129d58058809fcaeddc560791168601f59e1e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ARCCT2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64875d9539bc694b2ac8269a1beec203d46e4330e6814cdac49d1959260d0d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:55Z), 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/ARA492400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64875d9539bc694b2ac8269a1beec203d46e4330e6814cdac49d1959260d0d. 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/ARA492400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2ecab2e61a6385c7c03408f84bd5683ae015958aeec215639cd15d30ec8258. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:30Z), 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/ARA492400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2325a51fd2bbc0c8283f93036d6255c0e1f314d6c5e1c9da10e63dc26767ac4. 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/ARA492500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7514b896a89a47beaa2704a18ba88f19633d71c6b78d8eea6a4d45d802ca0260. 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/ARA492500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa923d2cc780571a800c76136bddb7794868678bd647896bd160383e023ce515f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ARA492500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c48bb930f326e0b9e1252026eaec939f9d43d7afc1d52c0241cf18b31b326. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ARA492500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf0bf33bf33701f37cb29666c2a6448f426163183d2413e42668efcc76fbee. 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/ARA492500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5affad7e64da4f9399f5c2d953dea35dd8ef865528464f0488d6a357f9c47064. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:17Z), 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/ARA492500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac594751f05273a3bcdb62a6f9c187f1d7d71deebdae88c1449e895077509c0f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARA492500100.