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 0xa2e78c38787b7d153ae453bbdc6aa3aa7e230b725e36de42f7f0e5a4cd35e5fc. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fff34a73-3d2f-4556-a150-e044b997a88d.json and https://artists.proofprofile.net/proofs/artist/fff34a73-3d2f-4556-a150-e044b997a88d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x604d65867fbf37a2e41dd4c066993ea3d54e703195877d9513dc2301a51d0be2. 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/QZMEN2155543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c77ff81fe09f1a28dd7a13cd8c2670da523f5ea29a21846a5d575a56efe0eae. 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/QZK6P1943874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bec77888b8e52e74fc5a0f604c510f918f104ecbfcc249d6cb306823b1959f. 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/QZMEN2155545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0136da8e68265f1ea88e459c4d18f869bdb78913c3b231bccbfe9e377bf6c600. 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/QZDA72049481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c78bbe8c405292e76234e6240f81eba62423b6efd1760180467287a9b7d252. 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/QZMEN2155548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d6913c065c0d2df8cefc011c74db394371412fd217ea1e2a28e0e2393c55ff. 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/QZK6G2149363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7ee6032d0550fd8357b4c92c3ed46e76bcade571a1b6f92aee85147a52be31. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZMEN2155544.
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 0xd532a060869255be51c4402068170d1c3117c371e34f8f2d24e846e3bac7e2d0. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZDA52033864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf8a5a6dbab2a886f927e443a6fbffe0dfc07bd9d1bf3fa1777a34119ab8936. 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/QZMEN2155547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65a7ad938460dfb03cd5e841b66ca05381ad60ff0d721d2f50bf78c65c9e7d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZXLZ2376887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44e577d0d2be19a61cc1f0c9448209116f54b2e1b2ecb4c76682421602b6349. 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/QZXLZ2376889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f2795e9c04ed2bb084cd193a7098fbcfd2d2e4b187c6a2ffc70b992838ddee. 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/QZXLZ2376890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64305a56b32282cd2babb5f1843fad95f45dbe6f2d4f9e1cd2a314e01d8f3f70. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA012581938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d56790b8a2defd8fa7abb9d4145b567eba468661f95fc4951fde81cd82f807. 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/ESA012557142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ab91da28c452b626e26d4434f5a4a9eb2745dba335fac37697f5e450bf6f6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ESA012581939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36611ee638aef9b34d64254647c308dce9034baa0dfc4222c2d5534371b00a0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ESA012581940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85da4ae0429d1595a7c3c5ee36873b3ed9ba48d9addeccfe3d4fe7d5d3a9f5c2. 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/ESA012581941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444df548660baa43105f5d83ecaf881ec73bc7a35056a008ce29185993b28a50. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA012581942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fe047c4cc705693eb14a1a1b431e83295dd5d5fe56887bbbbba9c2fbc8651e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:31Z), 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/ESA012581944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e41ed06e352ee6bc31118399bbfae2ffda23dcd357f683a4f2ccdcd4324904. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA012576436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dea66d2893058ab5ef3a8d019f0bb69499aa68ac46a6686945a83165ad4c10. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012581945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b9dac5b171c1161fcc9ff91de8d46701effb0d6ae56842588a183f2b8a0194. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ESA012581943.