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 0xbfbaead9d5facba8b438607e0b839b746b52873d53c0a2807d6b1b2488b91107. 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/233372a1-8b43-465d-84fc-6de9ed38d1e9.json and https://artists.proofprofile.net/proofs/artist/233372a1-8b43-465d-84fc-6de9ed38d1e9.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 0x800fb66cfb09b11619e891b084a12dd61640a59d71810ee36b74b4bcffa2643b. 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/QM6MZ2473038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ce4f790c369cd228234064ffd632e001129efb151ffe523ba97aa192548ea. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM6MZ2468815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b74dc7fc326e1b9e7712f879433e6b15a6eb4a6a619213388b63bac0774fc7. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QM4TW2417029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ce4f790c369cd228234064ffd632e001129efb151ffe523ba97aa192548ea. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM6MZ2468815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52240591b2edfdef759f8b03f0dea7b8c867ee1289a6a589fc00acf4ed412f83. 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/CAQ8S1637053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c7b1f54939e1dee3f42f9ec01c6a6cfae23819f8c147cab26a5eeb098c82e4. 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/CAQ8S1627598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c91a6eadf692ff104dc7e178e1b29223c516a3e1ce4f104713e531550f2782. 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/CAQ8S1625523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3424fdf4b3c773f1289d96241f2ed99a34090b94e72d29d8610a1e70e7a96d. 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/CAQ8S1625361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cb81e558a1293b44b50f469f592c835353f69e8a9d1d9a86cd163888a2ee83. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQ8S1624195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16205859b3b9feee449cf83c21b163274ce74958619859a4d13afcfd826d153e. 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/CAQ8S1622879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb091b6fbfa774f2d01bf68ceed1b2977848c883b9bd8e65dfe01a4e833c689bd. 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/CAQ8S1622513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f1565e6edb55cc6a325bc25eeea938b6816017a0e1967807ad63ac637d25ac. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAQ8S1622285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8635e6e12fe09f8fecb89070f1e606d978cb49a8c494f2038867ba969b08d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQ8S1621852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1595503480d021a5c2707a5776fd6b277fdbd28a6d3d4a75b7517f325267695. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQ8S1621519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c9857d1487795d995a3edfa0199cb0816e7ab19ebfb3bf2ba4d494a975cb6a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CAQ8S1621380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d622700723e7581fbec94bca83c2331a324561d749b39684c9fbde84fb07dd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAQ8S1620931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388060ba5f5fef7a2ed15ce2c1ec0742871d44533274ff39f814f05bb582b50. 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/CAQ8S1620503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503c6a1371ef57e9f185a1210bcd8fa8afaaa31ae51d9096c27aa2c2d9244a5c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAQ8S1620254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb2dffd4b96cd820cde61ee380fa19e88437ecc03e59ee4654de53ac77af25. 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/CAQ8S1619418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0412bc217dd8de84e59cdfce46e7e181120a691f958f0c7faec8751701d0f5e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAQ8S1619059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910b2f994eb8b577d185eb8f81724aeeada667a5d98d00f794d812ebae032d77. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQ8S1618946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a7f641e228eb2b496f3c8ca39cfda2bf199984a23ca3fe38c90eadae3b66c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQ8S1618718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cf37fea4e282fb9f3a1634ac5b88cb087e9d500b2fe826d7b1ed210dc9fd1. 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/CAQ8S1618551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fee9872a4253ecdcb6be6e5820370b68b859b83a0ebbc561bf1abcd7070769. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQ8S1617703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3271ebe1c57bc60a6e98f8342fcc35a51f5e7d7767b80a3cd2bb0fb3ac1dec7. 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/CAQ8S1616762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91f276110087cbb3f67ce21353b87516e1f5b921a5e1c82fddce79565a9480e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/AEA141804746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff22c6e68ae3d6bf10e2180ab499099267df229b7e259557c6e209ca6a95e1. 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/AEA141800449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf14c440469ee6abd467b0febf1a4a8c4443553c6b2217582b0f6be56423a2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AEA141705521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b6cad863274b437078600b7e73fb6ebed61c74241dd156c01ae5ff710550f4. 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/AEA141704029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdb329daac7d5a9363904373d191d2921090cd4e1a096a574cdb57e3f966e67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAQ8S1644840.