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 0x6bb0a4154a041b607a1fc60e807b40e61b769bf2b2b2c54b22924c53a97d6fff. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9b331e3-5ead-44db-9c24-a045fc76a29c.json and https://artists.proofprofile.net/proofs/artist/a9b331e3-5ead-44db-9c24-a045fc76a29c.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 0x48f03c96b914ba7cbeeaaab7b558a1ba959cbf0f1b39fb39541c25005f9a010c. 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/USANG2236983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f687ac909e019daa4f02d8132cfdfb2e2a766e2301d813f641e70b06028c1e0. 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/USANG2236987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5239c2ba618c50a3c7e525721432ed67f25005bce5c7f249a4d25dfdfb999adb. 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/USANG2225002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee46105fdf8a785ff6b6fbd8b6c88517ffd238a6409243028de56ea32d56bcb. 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/USANG2104584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad58421823bd73a0a541d1fa495bd19dbd0d289245ab1e10eca95c193e8337. 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/USANG2002492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c25ab368c97a2dcc60cd15d3906f3e5d7041ac9dc3fd6e64adc4b898c905f38. 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/US3DF2444445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7c584998603cd9891e1bb125c0bbd54e84fa5fd9bceb0e93197f2d932889f1. 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/US3DF2414243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825b140cd4977711a7870dd002cebab866bc69b5369cccde1349accfa94706d4. 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/US3DF2414244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4293fad070e61bc8f474fadf35d2de63a195f20ee9d4deb16d30b4103dad3687. 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/US3DF2414245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca50fb4576632a7e708bf0b64a4d345c476018668666520d15f2df63e0165bb. 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/QMANG2221599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e5deb266140a03cb778661ede99d1ac1f9771539375c52d802942f7b364afc. 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/QMANG2217104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a4738df9ba30624bd1b567aed957ea7b838adee3678ff2e220a14492fe146. 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/QMANG2212032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea535c90b726d1656a79299c3bb9c2c14523fce926130251c6e44a3bb52cd3e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM3DF2261922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9291e4f5e54357db8b166a878d80d0ff325cab0c87deb6c09bf5ec3d1f6e2de0. 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/QM3DF2261923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2b416e60b7d9b22ea82dbfbf300280836b429506c0da65bbe283de7222097a. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USANG2268337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4d5126b1161a932f33b3d8a710449f40df1d6fa7f7ae2de168dfb679543b05. 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/USANG2242441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725aa84863d8d70579572b5ebb37ce4ec2d1086c813f65bf35349453035a0f72. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US3DF2234933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fbd2d17770513239e27f6f16f44ce7c2e80964418fc4e9e9dc55c46aba2285. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US3DF2215927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c5f95b04f39c48b7b8a11ce447bc97255244fd6dfb373f7fe1089fcb45be2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2457422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b71088b8f05825a754b99ddcdaab960c7b3b5087c1ed530cc904592b008f624. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USANG2457423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c5dcd34e92f5e341bc93ee011a449a08b3c944e5031946196054520525546f. 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/USANG2468717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219282f0c69b5a8659e2d5fb091d2cd91560cc3becabf22e044691edf03e0a1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2449531.