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 0x81cc136ecffc3006fd3077f2a52d9711b92014e8af36021849334d36c69adbce. 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/1152896f-4db0-44be-ada9-34adb55e077e.json and https://artists.proofprofile.net/proofs/artist/1152896f-4db0-44be-ada9-34adb55e077e.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 0x2b83ecc960ac2dc8b0003749863474c6e2a4369144d6721ffa4ddc97a85af017. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM21509960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d34e743a63f294303c063f04a87065e351bfb8aff6ac124e756620062cfa3e9. 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/USHM21509963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca55bdc88f45941d2dee8cb574744f754d34e3928ecad42a5c65f9717f982d3. 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/USHM21509965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645250a257d5a7c2e4d890218cb98e371e0199487fa682de31f3e5bd840f2d47. 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/USHM21509971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665948666f0cf8f90fbfde2ba081a6346ea6e3daa8f8a9c2d6d5e04d69d50ef1. 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/USHM21509972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74af22e66820ede30f6305a77573b6a3e2e83f1da0559474d24fe2422c310caa. 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/USHM21509975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ede1d38e275da2689d9efaf30a60d3331011ebf8f66f8845ab514bf0a9dbcc. 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/USHM21509979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550ebbf97631102f986f103c2f5cbf39a4f6590ce626d1601f260fdc75da4b05. 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/USHM21509958.
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 0x83a296806325d23673586229cd239a10f445e078b81c4e0ef42dd9c575f7d05b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USHM21509959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e016355143c0cc4ba82a2cd001e0865dd822262bbd78ab86dd07b28f08c026. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM21509961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bacea4de7548521f331ef6999eb058ec0a32137800e1f3953f934d24fcae6c. 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/USHM21509962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1604b21e70beb68306214d5be0a68ea8c44f7be354f3992be1208dc6fb3d18. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USHM21509964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c22ad2cc57b7781cc6808e09f424046767824d5668c6161f332e5fba3153a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM21509966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bc491f79147205e397689a0dc1810009f87360cfedd91812a2e910640a6e64. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM21509967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60708feabb3e60d15ac1434d2a049d7828b42ffd2aa3cec8357eae90d326234d. 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/USHM21509968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9e976c05faf87b873597694c33c00e8def5cb810ac4eed5af6a176881de1ec. 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/USHM21509969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a210742b9729a846c37424bca6d60978c0aadd1f1ec9195f5f92c9b48ee6b21. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM21509970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50019e152ac242a890c1587e3015e2157a35a23e32c55fc35715bc4a71210d3. 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/USHM21509974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9519eddc5fb189d192456ee796ef1fa2e03445d7199d13dcbb4c4798994f6f0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM21509977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d10f35eec8725ec96298d9305b56d4f4b1408324e9c7563bbb3e8ad99b4bc1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM21509978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe388a38a7d31431cda24790833aa737c252b622fcd7831b757c819b81ac33992. 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/USCGJ1695835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa29fb9183371b998f8fbba47dcb052dc1cdec6bdc770f8c0c0bad3d2a4e11. 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/USCGJ1695836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596ab0381e6f331b7e108045ba9e68230d22107b006c5dffb4c277ac98c20778. 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/USCGJ1695839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8faf13435f96b15f2f9a236fc7c5a833cadc8b9c450ddaeb3f9668442d9e70. 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/USCGJ1695848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d64ad4aa35c55053c338488da58b9c95e98b0740a7e1ca4ad35fef03f4dc2d. 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/USCGJ1695850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d34b443e42791e4c2595cc5af81270bf9dde5a4c519a8c2ff006789e01d0f. 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/USCGJ1695833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29db441054c3595b30bb4842aa06cc749281ee27073d5f95358cc05a4c61146d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USCGJ1695834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa66f6d0c6d0810a37249ca4784b5a88e8175ec841b172f5a001e62ef85e793b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USCGJ1695838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dc8b6ba7ce26076ab61b0c45af0681ef3d19d27f26b3f5794353d7fceb3f20. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGJ1695840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d609d7875ad91724815b3c2c01dad537d993fe6ca84f216706afe2887deab. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USCGJ1695842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f3fb7ce680c510ef7d8b9c8aaea944dcc61408bab2237682923a4ae53f11e9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGJ1695843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b4beba35d6eefc347c7bf4a065577301d682426f95427144a0b480f896a914. 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/USCGJ1695846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cdb525b9a52667a510e0fb0dd07fd4cfa1fb788bc2a013f08915357d945598. 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/USCGJ1695847.