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 0xd6b242947b281d18a6d7c6d2c793020da61c6302dda8b302c465f1a212b99651. 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/7705e668-c718-48d1-9987-cf4450937014.json and https://artists.proofprofile.net/proofs/artist/7705e668-c718-48d1-9987-cf4450937014.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 0x8e88dd151ccad6e7704797c25fa8a4ab76242b207fe3ed49c07c273c9f1e5ca5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ZAC012100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d53a86273c228a691f32647e7bce5ba9d67ec031042e844d3986d3d055ebca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZADTG2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08562ca744894f5e6b68c72ed657276fcc6351fd6eb9975886ac656300887bd6. 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/ZAY362200836.
Bakhuluma Ngani (feat. Madanon & Skillz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089b5eae1a71dc68718c57d67ddf3d3a096b0f96ea4e17fd672a58f7f3cb321. 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/ZADTG2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716663ccd97abfb63e4dca8543e8f17a8b11cbfa7f0b87cc41afdcd685ae4fd4. 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/ZA75S2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eeca8010af65e5014b9b20db359d0cac33d7eee64624bfb80ce31a437a4d7f. 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/ZADTG2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd0a5f925546fce6c9b1f3c07a42a99037ae53526acba14d1ebd220a32bb415. 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/ZAY362200834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849dd7d6587f5936161b7f15bffc2c3a4f4cf4455efe380a635d9553a1ca38b2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAY362200825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e015c027a85f96e1a61a707127b891701f136f813836486d6a1a542e14ac3d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAY362200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6c6ee0ed1a0cdfa91c6e7e10ee67a8e40a2d1163f755206eab852d531a809. 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/ZAVDU2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664dc914579dcebb697b22ef926978e180ae1f26ca5df7bee5e6bd8e633ef2a0. 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/ZAZ642100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b61c7bb9d0e71692eb9b64eac5732a55390c74d09ae9981cf416424821845e. 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/ZAY362300879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec4e73d7c807724e0f12c7db0dce69a4af4f9830df6dd0ace3b4760e7e4c1e6. 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/ZADTG2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7af9578fcb8bb34c5f9189e9fad23ca5aae009a32071f31de5cabfd5646633f. 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/ZADTG2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cf236f6e41329df44dd801690c676f092a8ec0fd3e5fbb47339154bbc9be40. 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/ZAY362300952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f5668d7501cd6f5f5bfe8f7e7dbd83bdce12fa7642def3edb542394a304ed0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ZAY362200835.
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 0xb2edc190e27d0e74d93e57338b13be63898250da1ba38294c165a3a2c0bcb33e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ZADTG2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a511aeef761394b2f78e5a832feb825eeb6c8a4a40fee63e3bbddd59360a826. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZA7IZ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6be7c5baf344bd50b1f742b1b0362f6cc76355fd2a74d2bc20f356f024b66. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ZAY362200808.