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 0x9acc012f296fcc039cd1b6db2ebe38dbaa30eb6bdb0e256ec1a906b16a8a284d. Chain 2 (Bitcoin): anchored in block 953795 (2026-06-15T13:44:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e13b7d65-1e0b-4ee3-8428-7734735c4f24.json and https://artists.proofprofile.net/proofs/artist/e13b7d65-1e0b-4ee3-8428-7734735c4f24.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 0xf0522167563fa7f16b97d01d9dafeee4473261a17dd551378e21065602850886. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/NOX9X3655101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3149f211685b4945e16baeb303b3584510cfb5f148b6c916747378447c8783e. 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/NOX9X3655102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f08261360e2c299e00798ff03ddd4ba0254e870e83e938380738a292e81d6ee. 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/NOX9X3655103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f5cc1019589b58ecceb0630daa1f981d6967730594dc01648c4737f8c2e1c. 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/NOX9X3655104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120776b2c17d6477233157442b4ceacea5831a6c751984d28097e85978a08679. 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/NOX9X3655105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfe32ebfc09abbb366a0588555d10ed940663e5eefdbcaf3a4928df5500533. 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/NOX9X3655106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b27cfe6c9950e16c1cdc7e8dec8c06f8322528552fa83a67c4e984adf618a5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOX9X3655107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7736efb788a8427e5aff3cdc2be8a105a13157c6cce9f560ad1dff12fda793. 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/NOX9X3655108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e7e4cc839b4b11a30950e2461919b76f82dfeeb54102a6108ccf071f1865d. 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/NOX9X3655109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880100e7c779f9adb90c7b14720cbac8f816860be97aecbef3634ff491d26686. 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/NOX9X3655110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eba8d1537ddb41acd52c080c6bba5f80bb0522564224577db2e2d1b5832d56. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/SE3MA1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0d20485cef0e16b231ec64b907cba25aab4c21b33ac118c436bfb9a305cce. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE3MA1900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6f94afe0290ba85f7d25459f475af28de7c2482b37366a09a24277d2c466c4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE3MA1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ff1826cfa26f7900c25a1f3cf87fed61d6635fbb475f25272fa4fa76f1dfb. 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/SE3MA1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3b8845931daaec5d3dc341b3369963ae981d12df54b14e3227483204a77a5b. 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/SE3MA1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb61f67de3ec52fa75bf903823b48df7610a7b325cb757563c54620d7645e36. 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/SE3MA1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60fa5540d1ad2fb46d7668961a977ba94656ff7d6f9f0b4b3b1caf0cb264180. 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/SE3MA1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9554765f14d5bdd45c03d1ac5865e1f488faf98fb7dbebbb4b79d31389840a. 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/SE3MA1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd166d794672f8816e75f9cce22f67b5dce7724a8ef9f86aea6d862104ff2555e. 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/SE3MA1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d1243621f8c908bdd61549f57970e023ec034559344b8a2d1406f782bfd33. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE3MA1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadadbef53bc4c354593528532b682623b52ec21049914deffeb96c47997c438. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE3MA1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ff8854bea4420af5d851f70b01f4de3ba2355c1a9d601fb9f175c9467bcdb. 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/SE3MA1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed05a77407332b9aa8979d41f68f1c61daab5b2e6d62df39cfa9dcf80ac49f89. 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/SE3MA1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f98d1e10ef360c564b3739770a3a63c61dc005a40c19530b0330777b02e6cf. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SE3MA1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab2ed3a1845798aadb620cce2d16a7576c8d1b2ebd70c5e95c4fba547d774e. 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/SE3MA1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0d2343341a0be85d1a82980797d02e04b030c09c4011ba2417e56b9f8496c0. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/SE3MA1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb383e27c9fe015fdd5863298886fbc5b44a136efd11129dbe595866cf64a43. 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/SE3MA1400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab4296a6e7b22711f0e64e61b68748dbb13096aff3233a29e5ab0109e2f7a58. 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/USHM90710506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74982b6f7d8d36674d33c9270838ec977a1d4f37d816f070dc8bf9ddb1c2332f. 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/USHM90710507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df9b9551331ad680a7f2cbc8cbc7250ac02ad9bc4e4e811fdaf520507fb232. 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/USHM90710508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc81bc36747d52a4e3c337e340e6fc1af1c99f8a150b6a4078799525f351451. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM90710509.