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 0x2efb64a7fb5b38f389de5b97ab8bcec912be50205576634c1e5aaf499812a885. 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/9ddccf5f-c787-4495-a9b7-c8fec4cb45c4.json and https://artists.proofprofile.net/proofs/artist/9ddccf5f-c787-4495-a9b7-c8fec4cb45c4.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 0x52328a582c5f882b2b4c17c0eb87c81b916f2f2306ad0abf0fa7f3d3b11b3ba1. 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/NLCK41092743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857b12f5a06eb150cad3810cdecec284febba67a6a508e28cb7988fc33f582cc. 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/NLCK41092744.
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 0x27d43795009acfd13873a584f55084b917ffdda7fd7680daf661396e2f7dd192. 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/HUC261300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc4b75420cb8767bd2de9d8274e4c3689a84dd422389db730afddb3e967620. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLCK41075028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff806e6c8d64575645a49c69e32cadf31bb4b2716cf528a5562665af2170abf. 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/NLCK41068771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25d2c5eb92d9bc7783184f701c7ced34d7fdc79732a927783d7a30223b9290. 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/NLCK41053253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d27fac039f8a00fc2107db3e54ff81b99062c3895fefad94f051c88174d06. 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/NLCK41035564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90d08c8503ce1c66bbfac02f97b9a4b58fb86f4befb323d7759af32245d5785. 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/NLCK41035565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90221b47ea1c4f70c8145f6f0c41d8511d56dd334ddc15d65da414c8dab8e743. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:57:10Z), 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/NLCK41035566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252e89be2b371d9157930fc1998cb2022fa984ced30d1fcd7e881192c50f77e8. 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/NLCK41029135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1d993364cdef9faf661ffd5745251fcb00e14f547280ec4ccab581cc3c0b05. 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/HUC261300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047bffac424d5365b21b2eccfb021cb7e55e4e02fb9e6e2a3f4a2b1376ab4ebe. 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/HUC261300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c520d1115d9dca1d61b5a7d77423550126978b7e0f4f733d46062afe5a10d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HUC261300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbfa4dfe70b1cd8591e614a1ed5cfc4239f06dd7d1f75b89e267cc2c2d64945. 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/NLCK41017043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb281cfae8b6b446f8c304873cf71941a7c2b9c0da4051df504998812e8b77e2f. 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/GBA2A1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf719801bb952c861c7acaad642133bb54687e50e0ba812e6f96708de528cbf30. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBA2A1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644ecd99056a216f9df2778cb309e889da939cdd482bae95838860bc184d72b9. 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/GBA2A1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114e03a3cd5aff406504cbd2003dbc78377576ad8a06ee2a8411ec2aa4e3f62e. 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/GBZFB0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6a2766fcea11fb3f2eb218289fd42ac2d5b83e681b6eeaabab873b45f46b5d. 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/GBQXF0730027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa383ad5cac948eea4fc9624146befa032da6c336127eaca1802436759289d1cf. 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/GBYQY0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7189c48a6d125336d770a26583fa3ffd2e0a48094ab7d081bd65ab02cc6db4. 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/GBYQY0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1167a80e2d0d00209daa20f6e2331c7592ba18e60a9a3e0fa5520dece1db4150. 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/GBYQY0400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e233fb41a0958e2e05eba5939d3f477ad24a31e7dc415a691f2376d731d190. 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/NOESZ0500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbff59d53c9649b9efe562e657cb30f3f453ea1e0ea97f75eaec916d8b54791. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLCF10700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e64681c3ffc38731ad61aba6f5d7434a023b62fbd083e2b29fb230915e249f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLCG60700008.