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 0xb2d52ad8ed6eae3aba95213cfc9b64bb1ed11236834d77525c735b531727e196. 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/4b1d0d55-0270-4dde-946e-09fcaace3fec.json and https://artists.proofprofile.net/proofs/artist/4b1d0d55-0270-4dde-946e-09fcaace3fec.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 0x3493324cdc7efccead5c74b2576f8ada8fe38e9bf644ceaefdcd98ea76578005. 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/QZDA52343247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050c36e61a818050a862f101f4d1d0f7be114801543d94b7dc474fcb0b5ba9b1. 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/QZDA52343249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f69d87ed8f4f95dbcdfa7f71e2a629b3b7bb94cdf45e39fede95662b01f70a. 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/QZDA52343250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdad6dd1559183204f8b0dffa8dc3aba8583f5c5015bba1bab783f69c2f79e4e. 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/QZDA52343251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631e7e45712392d40336baeea2e44371506a20aeb6694c1a45582d4ae3c470f. 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/QZDA52343252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea91d56b2a4adb2123033bba12ca6ef9d4607a390aba18af3f966c2db5c74ff. 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/QZDA52343254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a2c25430c5bd4605173ab9d3a8196f6c6c8fbe9fb659eb7884b3bc97218072. 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/QZDA52343255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563d19141a764314dc5cfd8eb58e5dfbf40ae4838b4c27811f901f4e916e7220. 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/QZDA52343256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb834f6a0a30e317258481afae6eba4f4755ca291fc7b531d3401a4faced10. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA52343257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae124e8281dedfacc4ca595f987d54981e48289db06f2c79726bb751f3818821. 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/QZDA52343258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba49d80e9eeacb1df19e9fc70951ce2698354f3d8b88872abdbc7454517cfc. 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/QZDA52343260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcbc04c900d61dbeb2a481fb0137581bf65ab4f4908f18ff4d586adb2b4e313. 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/QZDA52343245.
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 0xc0f9a2397732fcdb1f3f931c647059ae68c950902581cf72a48df0cd82f66881. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDA52343246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549cec78ff305f0e597c6fdcf2002fee1569bb44f76c5dc852398517ab1c7f8e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZDA52343248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77075ee0ae0a9afe6ca27d99dea5c0430b6944d0cb331aa9c54b0b0baca2ce46. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZDA52343253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a2a8382f9dcbaf428919521addefe10013bcceb2862d1aa4f196fcb172297f. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QZDA52343259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356b6d0b9f45f699e50051db58672859589792649233c3158a33ef0a89b527d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES52408991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6a124949a7665b2a4a2bdf4befec9d51d9c5c0541ee52ac333c261a4336e1. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES72423627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4373a725208fec457b1aedfb05ea9a61094117d8c33b687f78ad37c188dff8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZWFW2402705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece8ba97b4ef704ddc44b09e0afaa8f53aa85f342839e03492867a61feeea780. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7K2448984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de55f22210113358b4fc8693051e08e39d0aed510cd70507543024165d1ee2f. 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/QZZ7U2451808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d047b3c56033a4b3ffa68ed7236191e23cf276690ca90279e3b0ea032bf1d7f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES62536973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65654fafa01860fac81f57b934fd8be4a95ee5bdbb38fc3efebc6d1a90635ef. 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/QZHN72567939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb508f17ef3250f942107a6c5e2cc0517e05d9908e9e387e70acbe3b44b0b8e1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:39:29Z), 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/QZMEM2598739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e333a1d595d6ccffc9c424aa8b32904d3b98171edc05bbc1849d9267e67df2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:43:26Z), 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/QZRP42597741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d3aefb56125c6b143f0576b07869facc9973bfcefb8c0d2360716e5448e396. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:12Z), 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/QZRP42597742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b60e34af1e876c77bc2d26613398a19fe1b90e69b945adf40f3a8d63284a77. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFL2537082.