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 0x60357cf9c8de7a3f92255d2b2238d2a813d7098adbf70ac24694b9b1c353f167. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a5e1104-47b6-49b1-9a0b-cda2ad90dcae.json and https://artists.proofprofile.net/proofs/artist/6a5e1104-47b6-49b1-9a0b-cda2ad90dcae.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 0x2592d4aae5e8d94ec2d1425e7ac7e3a7c8315a620b2c8db87a086677ee9098d2. 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/UKXN22316261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3497569f29e12ffdb7822ed0925a63bff8abba0fa6549e2e95ed18ae6c63602f. 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/UKXN22316255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa890aeb4ad9b0ac018e46fcd928662a2d356ba7073899ee516b4b8ff4047b610. 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/UKXN22316262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5922c9b6654d2a77405e101aa62a0823f44586ee90dc3e8c1b21e8b7e734edb8. 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/UKXN22316254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac06bd11640da4affc71b86b066be03170d8aa1b97b8f5592b28235d25505da. 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/UKXN22316258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41858d7d5f5f8473100b0ecbe7591b97975fd1312c35b5c830851f010d6a2f60. 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/UKXN22316256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e429c15fb7c7981ab0e331f4c46dd0b746978b70ad8774dda6b26a76736a53. 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/UKXN22316257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c221f8b319f75aac1581e376eb5dfef069f042502d7fcf8bb40716ff5ac1ca. 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/UKXN22316263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9b89e0695bfc06fd4043f1a843a4c1f15b193774ecd22be32b889151a8b9fe. 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/UKXN22316264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a5c3228ad9f58e34033cd44cb04b12bb385305b987a43874f6da3b1e98a3e2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:46:58Z), 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/UKXN22316259.
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 0xbd739bb5f7df040c1fdafcd4db3e81d5eeb26f210d6e48fd60956d79d5ffcddc. 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/UKXN22316260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a69306a31d9c44b65deb0afe8132373352805ca797d81abade681c054db51e. 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/ESA012392550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a0b3858c1f137f4dfd779c230f084a1df3b2f29b99997c37e3325b4ba87d6f. 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/QZNWX2352377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883988b03d7ac687346e38e2720fdac5180ffea45edaf918543a449061312423. 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/USLZJ2380217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce6fce0a56af8e18cb69a7aba21a0b52389c59de5d501453d9f00b7bd3d58e2. 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/GX3Q92347691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d843ddba6e176579422203c8455d31bea10976f66dc5bb0bd1c901eeff28319. 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/UKXN22243675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67963fecc96cbe2f3efe57fa78247df85d2475251256c3c58846ce6109a2f67c. 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/UKXN22239770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f2174ad3b1ea4a1626d2fc34cd769b0b885ae44e509daa291a350b45d7f81b. 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/QZHZ62245657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03942245bb72b64f6b90997bc38a8240ea3418b1f5eedf6c67345efec8db1f. 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/GX53U2097056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c262cf2b12124eedb2a7a722cd5dcfbb4599c1ecf38adcac0e145df33f0a16. 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/QZGLM2223435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bda0ff8e6d3ddf407d7048d73de30aaa6390d10a27a420c8a209f8b69945d3. 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/GX53U2001922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e18c6fca7f83f8ff8cea5e87294a6e1bdbf3f257cfdaede0bfd888ff2dfae1. 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/QZGLM2223366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a2556943accd6fd45174270028ea9643e0274762de6aa005b41c2b14f6411. 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/FRX282105600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a51ed43030685518f4e8ed75e680dc9b7c1c314d848812e091c099cb2607bf3. 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/BXJMK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dabb8e05d7b0f7e16cb4b09dd3326148a13c4b79642dc4ec3a21e89e80479cf. 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/BCEEG2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c90d7ceabda09349dee81d11968ffb0cf86ff591915ae438bfeb9581c69bae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2222189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc235df1e86a35c65dbc307019fa8eda345d4ffd5b1a42c541f119ffdcbef5a4. 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/QZZ8B2364117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2622ebcf18560b94a9929ab924d321bec40e39bf8fa9a3e204e68375d2667. 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/QZWDE2407507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e77647da5ca6dd15f22b6ec4deab4bd31547e9eb8639cecc21ba8376aac96f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZWDD2304000.