thumb|Roman marble copy of Myron's most famous work, the Discobolus. Towneley Marbles, British Museum Myron of Eleutherae (; , Myrōn ; c. 485 – c. 440 BC) was an Athenian sculptor from the mid-5th c
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 0x2cdc164127978812646dadb80ca957885aed33f78e8addd7474b2d133cb05094. 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/86c5d42e-e92e-488e-a349-adbd5cb6e432.json and https://artists.proofprofile.net/proofs/artist/86c5d42e-e92e-488e-a349-adbd5cb6e432.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 0xef1e85b30312b9cee3e9b25c91161ff93ec07135860584112f43afb43943161c. 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/QZK6N2291673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3f2b046a42d63b7e7c4734034ee3ba539f5e22ffcc98fe7fc7b12e2e70b070. 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/QZK6N2291675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6492eb461480f8c10f2d9de558e0a91fcf71fc7a9c8b963d4537f549fb3878ae. 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/QZK6N2291676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c4701d5f7fc08839424fbcc3c0d6dc6d539c778021e261ed763fce2ea26f98. 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/QZK6N2291677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374464c70419fa66f06d5ac58ffe5c48586f896b8c58d4dc133ae9476d850e32. 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/QZK6N2291678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f312d3f067a6057e0abf29eb74550edff3a537f4eb60f4a321f4258ab6d2fb. 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/QZK6N2291679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab937e44fe858f2f446eee0278b344df8ac8d882e29826daa529b8c2d48254ae. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6N2291683.
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 0x6ef69f4c3341fa026d2e698847216d065767b78ceb868012e738ac2e041d321a. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZL382416653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c5d63d37c583a9cb1e41c5789ec5832970becbba470d63b0f628ca4389194a. 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/QZL382416654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048556b237efb8b7c929e7ac35f4edb3e511adcd8d2f28d2f0a8ea27cd4817b1. 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/QZL382416658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f3f796951edee9764c4a46781d29b5579029d46ed8fc290de2a04165ff0f6. 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/QZL382416659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402e03dd29a785311681f265843fb92a29b26d86281f0cfdb377e714149e8d5. 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/QZL382416655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e612f7e0058f96a20b9c455b1aa52e757c8e61202246a19a5a22088f111bbbd. 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/QZL382416656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b0207c64867ee7e53a7c961cee940d936ec401ad18d4afe79751c1682c0f6c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZL382416657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba46a93c803f3a8e0cb5988b6944a4f07fa0036575e9776da0a381d588116fe7. 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/QZNMV2265996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362a21c0d2237f61846488b8e2aae582520dba21c0a1d7c134275a369cf1a19. 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/QZNMV2265997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa588aa42c33dabab4aa34f80a9bccfa8e7726988976b25d7552fba444fcb32a4. 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/QZNMV2266001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fefb57fdaa806ad3a0cbf26751099b9cd24c3d9c40d122d613465f07ab1db4. 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/QZNMV2266003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec607e369359f47b8e8426b3489399244d9e4fcb06907356d3a8b6bedf24633. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNMV2266002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f33147d99280aeaa2405806325d4ba680ae313ecdb52fe38278ccc3203409b7. 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/QZNMV2439777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e033568fdd5f8b5c986a3afc5518191f71bc4869ab0522b642d8c86b455910. 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/QZNMV2439778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc416b5c1f792751aada4768a9cc4ee225ea3de0645bb5636d41b97618e98f11. 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/QZNMV2439779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d0524128d573e630c9f62d3ff1c29a1a25bec1b20adebde33786ed4c52429d. 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/QZNMV2439780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4312d828cae8353ed49979ffbfbc613703dbfb55ed01b7847c2803b27c9edf6d. 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/QZL382393581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4421f175f6b5bbc9306df7d5c7b1f8d4bd6eecc4ee9832418c8fd1f1a38ef8. 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/QZNN22231611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0216b12a173514634e8e22e51f18dd76eeb707da6c6ec7b2362131d701348fcc. 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/QZNMX2249674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c197a0407c8cf53cb9f961bc3f19bbd3249dd3ad6724a5b7fe0c3c479ee97a. 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/QZNMV2220601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb28feec02456e7c1dc8ac86b5590e7e570e94849e9da1d27e66368c085b7584. 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/QZNMT2287792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc985226c16d29910371df7bd60ffafd2af67c373c13c16f40da4e3d1df83de0d. 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/QZNB82262264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfd908c4b146923b53df30cf36397647f0a8689d99af2be473bbc805e4caab7. 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/QZES82288651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e28f8ad61eeb4efb1cc7f9493e5c5fc17d4bc1c94d41ff117c1fdac2d57f6d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZLL92232273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5080d6f1d99b97eff9e6b649cff38cf17d130d8c94ba7ff08a06616aca9d5. 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/QZLL92232274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e53286b67f3fd0868e5052b5f24ee097fc4c64ed0b7d4cc252b80335e6210d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZLL92232275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039d75f65f49a79c972445375019d5097aedc040cb5eb507f8b48cb46687f074. 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/QM42K2328035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a062a1ebc654b1c8ed053ac7c14f579ea65b921630e27adeb1840c5f9708e32. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMHL2340962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e196054779bb9f7d105f90262e2a53e034bc32863a7e2ddabfdf765a7e9e8. 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/QZMHM2365363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8719d425d982f180cc8804e11634ee5df185c61a98052e91e94fdb3efac33b3b. 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/QZMHP2303539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f7b0f0ac1a0e3c218edc051f428b203765ed5da17471b030487c5b614a8854. 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/QZFYY2359100.