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 0xa3eaf4ad2781d68f9b7ca703f2f3038e1284f17f24964accdab1ebdea7660ac8. 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/0a8486e0-1d0b-4ac4-8ab1-329b244c72cc.json and https://artists.proofprofile.net/proofs/artist/0a8486e0-1d0b-4ac4-8ab1-329b244c72cc.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 0x0ce3e878d95754361f79c4140199aeb1b0365155e6ec1819d0c0d71ccfe8db64. 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/QM24S1703465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534855c4a4ddc710c0842fffe9c18cf57b347a63ef7e87b8f04996b452bed54a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM24S1910458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe186875c3183395b6d00768ee90a8b517d5a16c7a16b2e3253a89def110ec2b1. 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/GBCFB1605400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449b546a5e1438f114a51e5731c1ab2c670c584b52007ea0b7d3b641a4d4fd1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBCFB2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449b546a5e1438f114a51e5731c1ab2c670c584b52007ea0b7d3b641a4d4fd1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCFB2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449b546a5e1438f114a51e5731c1ab2c670c584b52007ea0b7d3b641a4d4fd1. 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/GBCFB2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aa2191d90402d0b972915eae5d98caabf1fce287073a5fad9145ea2d810a2e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCFB1700599.
What's It Gonna Take - Machinedrum Remix
What's It Gonna Take (Machinedrum Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe096dd02914ca5024e5549bd5685115d4afd44bd47e7485b38d39c40988acd. 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/GBCFB1800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aa2191d90402d0b972915eae5d98caabf1fce287073a5fad9145ea2d810a2e. 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/GBCFB1700599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe186875c3183395b6d00768ee90a8b517d5a16c7a16b2e3253a89def110ec2b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCFB1605400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd15e152e9263cb2d825e98c27300d9c2e6126cd1b4621ac94c6ccad249e1f7c. 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/GBHQT1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea034ec1fa6b6fd2b612a9c66602f7492b34ea0947b86fecdf179b74a26cf462. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACW1762894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9facf02482a83141d7b48fd47a6a5fba169d159da996dafdb4b4e1b90a8a0b67. 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/TCACS1643320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf14aa1bcb00c3e6b66538a788f25db3ad6735c737c3007f2acf5e7c879b20e. 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/GBCFB1700551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc4e5fcf9698996951ac7c9622b9f70b2abaf9203484dc4de6b3c576d3a09b. 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/GBCFB1700553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24c5e64de7843b850f669d2574287f8dffb370283055c459ec134f5bcc2d4da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCFB1700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1df89e231f63329b929e7b4e117f092a6b7a88a8185bb3af8a470a66516c12. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAER2059796.
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