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 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 0x21dec934c03f22c65c05b20ddb37a671b54e5fdf6ee2688f166f38188fdd5020. 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/a64a6db1-1d14-4f8c-b94b-c50f36291872.json and https://artists.proofprofile.net/proofs/artist/a64a6db1-1d14-4f8c-b94b-c50f36291872.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 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 0x226dd08a74c953a3faf06ec7af7dd3ffa894390b9f3409699e216e71773d2627. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB72507998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bee453f4761a625e3a2a2ad768ebf89c21e7c9190da6e45cf68e97e0d318a0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB82578713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5e07b33398e57d30a9d878a49a7fc9099e2323c0463cd0590dfc9feb3a6827. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB82571870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68ce52a3b7f82966d89c65eb694d651d4dc840c97974933d599dfd5df211db8. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZTB92572023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99367f987b015b2436605b7db3164bbfc1610a8942a4e3224b5c3447a002dfda. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZWFH2530509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30973ca3fd75d5194018b53c12e33e6e4f51bf901ad952456b37cb70389d788. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFH2530510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c0f7b728a73ca03b1e819ea92dae680abffe8d61b31a0c923b82035666cad. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFH2530511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a66f40505fabd7de24e452b063ad6bf8833ce21911ac6239f588895c9424fb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFH2530512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b45e9a1089951aa60c27a1d737144c5ccef020c2360b69ae53f33f3be84ca2c. 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/QZWFH2530521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e8778b6aaf68ae0d134590f75e5017f69d49082e1b7309f032b3d02f515b8. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZWFH2530522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956895825d0b55c6449c739e4315df83653f30fb3a5f8a38c8d4d76d41cedddd. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZWFT2550311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a69976430f5b05b21edd0ca89f55816c840f33ca6f01a8667bf8797706bc3. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZWFT2550313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77730daf52b150e53be8aa7d4752bb9fc579cc8bde8f0857952b0191f8f7e112. 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/QZWFT2550315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901151387ab85aad067c71007d0d7892546d6c24579916168df5107c7c5b651. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZWFT2550316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775db6b1c986e52aa465c96b58b3c51afe60c8e35a70c6d2dda9f3d5f2e35c15. 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/QZWFT2550319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baed1481f47c79b7674292b0034f962886f276329543c0af7e3053d038a8a33. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFX2520169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c9b14ea1ab1411250bfc41c9df327927569a75c192fbcaaeb9e1718d3e6dad. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFX2565459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2111b2744db42cad544df804371c128634b4c7d17b0ef3ceb24920e061cea. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZWFX2565460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb385bba12c61671a8cacc68c0887b6d45212c845f9f6100756dc3f955ab9bd7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZWFX2565479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff854d8531253e240d3280cc21e65a8958f674461e9e1ddb72bedfd63d9c6e99. 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/QZWFX2565481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c71bb509f64be12245b7191d6ddf2240a3044068b6e72c977ac4026a174c78. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFX2565499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498316e5cc0a57076e6cc5759b5b6d7d018c7749d8f20ab3ea2b12f9d6db5cec. 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/QZZ772582551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6703774a96bff96643889d9ed34b864fd52aa4d961c007efc014f2ae5e8ae10f. 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/QZZ792516035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ff2f55e22994bd365a6ea28b5b14a5d77b9d703c127d79fe1650d5834d89ef. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZZ792516036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc0d061e9a4d932e8a0fc049358187fef7beed8bf170766ceebb72c42c61053. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ792516056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a77f7f85c7d18e010f0ac71afee0159eab15d5383d087581477f9618dee6894. 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/QZZ792516072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259f8c388c36752851a548139e737e496016827ed38de4dffad9f24f85ea180. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ782531769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e886ea5d337a0f3f6e9772f466f04779a2cc6c9892527e09869244f2510ccd9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZZ782531772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7eef769ef1e5b08e9ab9034f8285445b82729b53c2c7b8fb9ea2e6b91786ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFT2571025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaee7d9949027b681ba8c1864a8c6ed19851b2f1ab0cb581871b86f8fb86d7c6. 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/QT6E82558368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671417b4554b58312a1458dca66f83e080e349219926aafef915ff45db1e1867. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QT6E82558370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b8dfc343adbdcc90120269f9660ecd88ee90649a1ae713fdc91dac04033c2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6E82558372.