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 0x3d32e69ed7699e3a3abe916b93795c9db26c2181ce3e96f46e52ca6444e359f4. 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/b6591cc8-23b9-46c5-9e64-da67752b0012.json and https://artists.proofprofile.net/proofs/artist/b6591cc8-23b9-46c5-9e64-da67752b0012.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 0xf1c0566d929d36ed138d5f62e539a0bf85baf7ab141fe2faae4107e711022ace. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:05Z), 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/CA5KR2023187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b06e8ccfadf47243c35d7c1323031c2880c68e15e477cef598efeb03010559d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:41:53Z), 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/CA5KR2023189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f63fa515bba4fe2a1b1905e3047187f1e8c7fca219c709d9f6da7a9e205ccd. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/CA5KR2023193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8b9beaeb2599ef07a772767f2d4b87d0aff4fc0795e2f18323ca8072a59d7c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2023197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebd4bc115a344552577591feb50599f92c130362614b282be16967a621450f6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:49:55Z), 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/QZTPX2182817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e174747cc3f183f56be32cd141ae92cbd478f8a876c1a51a585030479a04ef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNFJ2304541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ed23e84f9e2ae06433b55545a924652d030b4de4a59c2521457d4ce63dfb60. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:57:51Z), 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/QZNFJ2304542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0fddc6753c3ba5ae92fdf27147ba298a26ae9a76c0cc7d92d606707a334e3e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNFJ2304543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bb303d842bb64f9e4c637779c1868145a0449a34752fb4c9584c1e99dc5269. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNFJ2304544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9379083b63cd2496be342c0c8593a3d5b36cfd90b3070ff4c64cc7110b4f585c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNFJ2304545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe35d310800e4ddf7ff7e665f08269e54b1f57cb8500de706eed25076a363e4d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:38:38Z), 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/QZNFJ2304546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d23871d383d507f1342bdf6bfe199c1b298d972c895b9aaf28bdaf692a42890. 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/QZNFJ2304547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52c4f25d0a3fcc0840152f0a8e434207fc251a2fbdbcd1e81b95296c2872eef. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNFJ2304548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5245695212bf014dd80b6d18cb582222c7f787829209e63379bec9eceaee32. 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/QZNFJ2304549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef85c1e7b0e4b69b53b522f98e74b721368d69c966fc70a188ca0d0df2d1acc9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNFJ2304550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34665792047b0fea07bdd6f9b3fcc40280960e895cffc1a7462bb1c6ffe44787. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:24Z), 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/QZW9L2308196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d92a5e0a232c02c939b3f43dc298f05ed057767da9f173ff6c1434b7b72913. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZW9L2308197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9b1e7a44f4f0509bc57ff49a2560965af87cd82aa86aaff2f477b96ef748e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9L2308198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda229c20c3c6086318abc1af6d9d458b27183b1bd159ed988485ee419d3eca8. 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/QZW9L2308199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a06f719e7f77fe81f509e62aa14349658f847d6a8f54d3cd43722903198f348. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZW9L2308200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da6173602b6acdd328be17f3eb54e7a60c2cdabae1896a4c25d0372a450e28. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:46Z), 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/MXA3V2442769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c311de1c45a642d7500c3d40f6ed14e9ffe8899211f785aaab7702e4190ce46. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/MXA3V2442772.