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 0xd918221840948d8e16d1c5e6a393a957452969938963bb859b80e81951484860. 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/974a8f6a-e8ff-46e3-bded-ae6bd4e5eb27.json and https://artists.proofprofile.net/proofs/artist/974a8f6a-e8ff-46e3-bded-ae6bd4e5eb27.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 0x0378d2f61becae2478a25b12584a3f74a067698755cb21dd2707a003d0a5faa3. 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/HRA047958495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423a5904e4238523716fa7099f0c59810c8b8a41e1bef130efa5e8de1d75d1c2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA047543223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba5406fe2ce538a4fb78cfc27d545af07c0e2633dcd0f26ccba8fbf2b02f0c9. 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/HRA040858496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ce00a6925238db51da937b5ec15bdb4b584e898285968be693a74bbfc1963a. 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/HRA040858497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd2c9cc9fc99ca520ce2d817137047b72bb41f5fa8818ecdd30554c4f8f3441. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HRA040858498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24995c54e8b1ab4b632a8720ef4ea32f7997f4a4f84b382d09672ff3028e62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HRA040858499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2431cac5118abb68c40f5c5dcc40876c2eb0159f3524eebc28f63ddd439f343. 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/HRA040858500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd251b28ab919d2cf3b1b35c29e86781913bf30a69f788b2e9fbd122eaf51a860. 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/HRA040858501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0324b21d1e2224b4f7cec20d2f3d9dfed2932a16184683266450639a5e3e9e8. 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/HRA047643229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd022c8d1409b93a9f2963523e4217ed652909fda5778b7eef7456e0cf87fb91e. 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/HRA040752900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab685dae2d93c0c79e0bf5c4da6e4f31f3d5801fb50b3e33048a6fc18a95185. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HRA040752710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c4a63037b37eb7252fcbaa85b821fee068db04cbfd9daf434d1f806dc6b8bd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA040751473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944cd4f72d4509474f15cffd76183002fe7bb4b75e8f1275faed51195badca9. 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/HRA040858505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd494ec1477c84ecfb839f4529139704126ee12c32db3484c4f41410d12679. 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/HRA040858509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc694551e928f170940dc961db40d2f9a16c3a6ebcb9f59d590f9be871c5ddceb. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:40Z), 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/HRA040858493.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba307a7c431a36c140f34ce3b9172d9d75fc19a2f552a233eb113bd092ce51. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HRA040822781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec9cdafd12bdc6e19aaa0df663b13105045ccc07830c235748f15386bd22161. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/HRA040858502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d862ff86144eb92fa12ae615cc1e737ac24936005d042dff7067de5164c3f2b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HRA040752688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1110589ef9f8a45b35550eb0636a6944ca9839eaa297a637ae5e3727bee84df7. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HRA040751471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b0d33fd7e808523d69bab1a190e301c1cea12e9219ff328c2ea3f584522df. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HRA040751472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8840d9a7e31575b2060148d22065c5b376c4ac69c6218472fdf5e26b4e1fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HRA040857777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f2fe2c18bfc1cce5f0c1108555e2d935e31621aa17c3afd23d3b42c50d3ec. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HRA040857964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0413678fa777407a525ab09eb254a0b7994df9c265dfaed1399e4fefef1aa3ae. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/HRA040858506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0f8770930962ce50eba959174a74225fbbf2389f7a044e0f01b7a07491ebe3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HRA040858508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ecf1eaf0c0d353a53a0e9342c88b784f8cf1284c001f5e03825670dd9c47c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/SIA420600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0216b91497a2118cf9d02bf5c46b661313bdeb2f28d46b9218c2ed2f12d6c5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SIA420600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62138aa196b271bf951aad601845c28ef7d2be6d36dd6350e2ac5d4875c19cbc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SIA420600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadf3aec0ade790632c6131d6a5375cb1292053e58c631466315f2ef0eb3ba9a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SIA420600063.