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 0x8bf7634bfcf27693c63a07931c458e9427d689ba2ed14cf1a83bbf50c5b409c6. 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/17ea6a04-4965-4675-b34c-b7c017450e46.json and https://artists.proofprofile.net/proofs/artist/17ea6a04-4965-4675-b34c-b7c017450e46.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 0x47f596fe95fea325c854774fd58d3316226c522492f4a35bc4c7cfc4b4709c8f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DOA1A2300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091dce56e3f8c5fcc561d1567df86832f97ce782a30e9b7684752f77d502628. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG2564364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532dfe60a15a0fa00d2cce3c2cbe38f740d5f41bc8e1714e943fc9ca070721d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USQL81000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3350c9d4a0bebd57edd9b1fe534f60189852446f8a8cf9c1287e135485ed7cc3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:30:57Z), 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/USQL80800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d4d46778a17ce96c4a7cbbbcbcb7d78fa4b1ccce53605c03b19bbe890895ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USQL80800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fdc0d8323c8a62e05ce2ad84b7e659bf6ff58f8fb4adc9457c9fa09effc1d1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USQL80800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf3e2c4233b8070507c60dc88771fd64c696284c7c77d33a7934fbc94afc6e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USQL80800853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e7d4ed0a22bc3ff868bdf676c7aafc30234aa2e1f21427dd59db514a952c71. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USQL80800856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a84520cd692ade1a33bfcef4b942d34f03c9c9ea49814c36ac7e2e24fe9e31. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USQL80800951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3d426bea54b61e10d796807bddb421f20b96e5f1bd8812c89a00d91f467b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USQL80800954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e6a738ac5007f89203bc4d0e6eff7002c4e8c3d9cf74f77a3cca00d26efc09. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USQL80800957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31065b5bfe5537ad4c581386cec616eea8fd1795c4133b3fed0de8f281d34914. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:26:40Z), 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/FR2X41716910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9da2f718eac303f60e05190206eff1a9f088b428927ba805552d1abc2c5968. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR2X41716917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6d11d3b2c498c6d2dfb780a41e9ef9ff609f1a17859f3ab5b8fcc583ebc691. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR2X41716918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec0fce011a64694aa25890c67cf42438e928a21f4a77ad9409c9a8043075389. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:44Z), 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/QZGLS2568794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340b484fee6744f37a85440b0bbf421938f5d19678733bf2685218378b4e0b6. 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/USDBB0680410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dfd502eca3e1073e8e086e291f972263674ecb5697d41fe2de9a688841962f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USDBB0680428.
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