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 0x9829d13eebd3a5e420a718c8eb9c0081d929404d0cabc82ed855cc7e4015d3f9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d49f81de-bdb7-4535-916f-21052a4e5496.json and https://artists.proofprofile.net/proofs/artist/d49f81de-bdb7-4535-916f-21052a4e5496.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 0x5de56b8080f3ede427aa433c270098445f42f355772d1de5da0fa61aba51c5d0. 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/DGA052431184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7282e4948bf0bd9ab35a4500aba287c32fbf7c7136a0842c641620fb225fe0d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DGA052431186.
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 0x1c47de27db9960bc8de0bbb36663e01d2c9a38f7523d5504ba0958c55ae01245. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DGA052431187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e71649b8a417288516ad70da2be344a1c580cfadbbd0cdcb5b8c3b1362970. 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/HKG732267386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9536a1450a64738b6256097a52f29309ab66d1fe61265fd7df232754f5fc4d65. 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/HKG732267387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6b1454e2bb11d139d1e72590bc7a4923942619ff79b40f69c39ad75cdcc4a. 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/HKG732251304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94db43eac6c43624e1887a26ffc2f8a4f56b43fe95a78849ebd0f68fa0c7e92. 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/HKG732241535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f8882db2d9e54249bd60f5505d3c08b6ee31b7f703e5bf4c8af576f5fa28c8. 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/HKG732241537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32cfee63eee304452b0ece2893cc020d41c4cb931777b75bb28daf944835e02. 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/HKG731789483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571ce29d80f6cc0b30c6820227ebc9ac80ab7e90ec3996d62bdd591afb103004. 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/HKG732215185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4acf74065178f0784e58a93695873e00bd799ddde2461e8a6d0441b50a1eff2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKG732215203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64037d7a8229210183771ff86224ce6de0ba39c66936638498580eb0a809dc4. 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/HKG732215188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddeec9373163199c97b6580fd19f18c58441f22ac6e5061bfc1f7aec92b5fb. 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/HKG732215189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef268da522f01f7c7f3f41385e41c3cb7243ef21b2b5872ffd266779171e87b4. 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/HKG732215201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53cad5262bf6e88172b28e38446450abfeb42a07831c97a8cda34fe968da4b1. 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/HKG732138479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d792bb7fe261f73cc001087e82f8157ebbd5e41f641778f5d5c31874755c02b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKG732138478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1897e997ec600d42faee15fed79e2bba115bacf627c329e0dbd34f4e09b4a40f. 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/HKG732129367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1160eb4cb5e826237fc6c04e0251c02b0a013f69ca68922d374c16a21bb5d04b. 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/HKG732129368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3d028db921a141a92906989adaca730af6459ced49eabee132190ae7b4488. 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/HKG732128594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c87349e06fb3de2e0fd5b3b576c967c002b98d2bce638b8911a60c9f1e1b3c3. 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/HKG732114687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb20bcf4ebe2731717ace13ee2f61a6c12e500541cd671b141bfce1214406d. 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/HKG732140332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bdd0d2913b480a079774f8d52b5bfa746c325450517afe914404c597aabb27. 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/HKG732140334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfdf7b1cd06a9761c1217466721dd0c240ab5637d4d4af5cc836869301b77d. 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/HKG732117408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187f54b3c3901edd9ddf8e179c6a43a7a5c25b7110a48e0a4294a5d2e1ae595f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2119496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d26be72a8930cf7274b896845f3768d23dd6a5b7fc4c51ad7e23a3b504b0411. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732103231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7aa0bb6c392b9048ade857a874b4410a9da88afbe54cdca927871ecf0b6eb0. 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/HKG732103232.