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 0x98d99721b604a7de0c29bd87ff23a0051ae2f53436759808d0606c06e777ef00. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc797652-71c7-4600-ae6a-f54151c11c91.json and https://artists.proofprofile.net/proofs/artist/bc797652-71c7-4600-ae6a-f54151c11c91.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 0xcb5a6fefb2817899d1ee0a840d2a5a442084bbe20f3034ade0dc95a350271d62. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TX2569595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc6b3b0c874b034713224d71e89662a7423e7fafba392e86a1483d3abe25542. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2518190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2805f5926a388ca894dcf45f26b1f26eb3b83e51357fbc988e5d2e1c128002. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6MZ2518191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5a6fefb2817899d1ee0a840d2a5a442084bbe20f3034ade0dc95a350271d62. 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/QM4TX2569595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a86d4f10dfd7593f967cbb2cad048daf0044360824abc7c62b6856a75f5377. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2518193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98a28c2c4364d4f6052b98a9ac09deaf5b35d7f5ba082e4c4a6b45ede32d83. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6MZ2518194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3a867c22e1b53b036d6193c879de052b157b7cbda7e64ec196b9debd2f5da. 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/QM6MZ2430358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edfdd8ccd2e3371796ef04670c3b33f289602abe29ecfabf677cfc5db8e9daf. 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/QM6MZ2430360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cac420b0e1183ab1c0bd514a6627798ae0eeb63b61e5ac506558bed402a5b. 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/QM6MZ2430362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a14888dd6187dafc903bdfa783d75277e34bc76bdc8fa7cf0379b5fc5a5944. 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/QM4TX2479304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a14888dd6187dafc903bdfa783d75277e34bc76bdc8fa7cf0379b5fc5a5944. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM4TX2479304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4f2545aa8eb84c483107fc14c6baaa09bd533b60aab27c08c2fbb9d04d446. 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/ES21A2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83effb80efeebdf3a4fc625a96562a57775052b855750e4f0b108458bbd9fc0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM6MZ2430363.
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 0xb6c6e1f198e6f747a3c57d044786ce00cb9affd113f82192cb1db6ae5b58f190. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QM6MZ2430359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372bba44be0543f63a79fb457c691f3b79cbbeabc9cd359997b54142f1556d54. 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/QM6MZ2430361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae5347b313400e50f796530ef9b189ebf9d25c7704d0adfe55efda6868873fd. 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/QM6MZ2430364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1ba9a9e6e7fbc9a6998c9e24e1420d933f0f32dea441c83ef5d75843b32ecd. 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/QM6MZ2426491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca5bba0aee2eeb1a4831f70a5e41abf732d2e9dbc33057ae4935d87f38355a. 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/QM6MZ2424433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d357ac8991e1d908ae973e4efb1e07cd46cbf07905da6a483e059e5eb7bb89. 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/QMBZ92464580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf540a5478f60f2321a0dfe27adba6be731e63e4d1373b2e4d2183efca43e314. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMBZ92464581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729c708bc62f302b09aede2d1e52ebf53eb52f2da38f1e6ce51a115964d29c7c. 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/QMBZ92464582.