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 0x36d1d1b3691f13eec7508d6d888423d518cc33b7e6415df4135ca52b9715da31. 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/6cec6f1e-b0a3-43d6-b6e3-ce155b2ac71c.json and https://artists.proofprofile.net/proofs/artist/6cec6f1e-b0a3-43d6-b6e3-ce155b2ac71c.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 0xaaec3e8592facb21006ef1a95d232738bcb752b8b97281119709d89c15290ee6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USQY51448938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72985254059527f421427dab6d405f072fb1c73c03b597b2a33f203a89e7b3a. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USQY51448939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94985206fbe7bd25918a64cbee447fa7268b725d28722ee25fc2150f0bb87e99. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:15Z), 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/USQY51448940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ebdc63453621e1242608cc93dcf6ada01cd6caf29cac68cf69b3cb1dfcd591. 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/USQY51448941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a334162d65f8be432cbc086a6593c6961e61330590b38922ae9b3e071034d. 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/USQY51448942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515827f16d998e33e0a7e80de6bb68c94eeb72ec9aa8e8ba525517327962f563. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:46Z), 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/USQY51448943.
Pass Me By (If You Are Only Passing Through)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3213bc988d49eff8a90d2ac8246270b91543db413f666d1014270877f2181368. 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/USQY51448944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887d0e056118f9b3a80d44cb4c6da0c9740fa071c5d587eccbbc2e929b1d5e93. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:51Z), 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/USQY51448945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795b32ab2c8c4a0121f990218f8ed260a8d1a7cbe7a48a8364ccff87eee6894d. 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/USQY51448947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc701f917d89165232f41fc7104ed652c80e596cf554401fca62eae5de401881c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USQY51448948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a444a8b9045a80acacaaf291b2699eb7d63d0648d48e2760c99fc1b45f4e8d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:58Z), 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/USQY51448949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b08e9f21f3dba49e4b07feb8fb57411a7b6aa7ea99dfe6bb6bceb6d5103901a. 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/USDHM2100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedfc9634dd749571357757d6ece8da71b5c767c576e51b3294661430113ebbd. 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/USDHM2100531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1f7abe6b6dde17ac84bcc509fcf91e4b176ad1dd126a321399575e1c692530. 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/USDHM2100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7113e0e8fe89d3a1705188acd0dd262d8d0127152514175af8f8f5c281c8d1. 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/USDHM2112463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c2ae6404e513d0f4f77d8a040cb7820750a336c6002a59bb05dde756362596. 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/USDHM2112729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0c7002c82c4af17cbb8a304fc28bb324ee8f27c9dd1e80e2d92ff9bdabf3b7. 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/USDHM2112739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07b4beee5527bf9a1dec270503d8cd0c871f6376aaf29dca59b3d5c778b534f. 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/USDHM2200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7fbb4867dbc7930d4a73d428fed4efebee1e16cb1985420287941c447857b2. 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/USDHM2200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47317c3c389e1d072001a0b9c22d4bcf3304849e0e8b0bfa972c82a4171b4b19. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USDHM2014030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e593deac5191f6920d208a01ef8fa1cc8354e42b4fa29c7d1faa6717ff4d277. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAHK2329117.
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 0xc383cd9bdce40cec17258d2a841d7308afbbbdef3a6db5d94d6e7129cf986961. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAHK2329152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6f91c24b5e68b42299b44c4d4a1e029b6d50412074bdd4a7f2da8812a43417. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USDHM2014040.