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 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 0xc1cb63ad8531b407621ba8e0fd8b5b5c6c9e640289b73faf53d83f2a48e81e1f. 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/b70a6e17-8ff9-4a69-9255-f1b4a85fa2ed.json and https://artists.proofprofile.net/proofs/artist/b70a6e17-8ff9-4a69-9255-f1b4a85fa2ed.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 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 0xf279cc0a01cbf6f4cb33bac0a2f51f58e00dbfa3d35370be4721e9dfaf2a988a. 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/GBLV62005397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd261cefcdf9616a99d84f7c5dac830f5ffdba3697c5b9284cb261729c4b1af1a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:53Z), 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/GBLV62005398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c682c6c90a9b67ba797d027b34b214b1e70ba58f433f53e3752dab0a99c72e2. 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/UKACT2330785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65f10f018b358ffa8ec029148f20811d358ca9c06c2c7183d8c8c81f51339de. 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/AUXN21502363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bc65cb46abfa6e4843927adb9a44516cd26660d0f5177b52b572d29eb7eb6a. 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/AUXN21502364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503034299969960a26e8ead98180061fc1ce875654c9f831fddeb445d95f130. 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/AUXN21502365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084d6cde986fee90f9b9a159dc727797ddbe869b3cc7be161ee32a5e4c684f73. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GB7NR1219210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3f978583092533ec3537c436248471d8a26d7a40f703456f2aae2c3b2390c1. 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/GBKQU2392029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819c327e8bf3ef6d93ced18a5aff66982e478f4392b2a4983c693c0d8219d684. 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/GBKQU2392032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aee771c15174178ef46da0fe95bc023b37a9c26df404f12db71283bafce3ad0. 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/US83Z2324192.
Instability: Closer Than You Will Ever Be (Fur Coat Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3abe08a13a47524732f688f0f236ea77e078ec1f6e9642d385feaf88c2f0c7d. 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/GBCK92200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54149c4038087ae4d67c7e79f1201ab0b19c30e7afc32aee865dbfd50023360. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:38:30Z), 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/DECY52100896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f9b808c18307f21c7e5bf58041af9f8e2887df4880a8f123487eeeace5a9eb. 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/UKFHN2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68240473cbcfd3c5002349bd306eb463564971e86af7aca6c323c0634a4055ef. 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/UKFHN2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dca52fe08c6ffbe048aa956ad2116ca18064303139b01c274be47c1627dbc6. 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/DEPI81902756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdfbbbe835f4919641b3736139f2468b1df56b208f34b53fbba6e9a998e50e5. 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/DEPI81901284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b4576d89008cbdf89f1c49ee8ee90a5608c8ab1fceebb3b642942d54c9b82. 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/GBEWA2106513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f98d7b89081d8798287d8e342236006c3eae4c90b7c16dc7dc285a67b8fe10. 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/GBEWA2106518.