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 0x7e9e89d6eb6e53bf460263aaba6dc00ed8d5436433f1bfb00eee6bf639b36189. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8063072f-d966-4943-a0e4-383ca6abfd4c.json and https://artists.proofprofile.net/proofs/artist/8063072f-d966-4943-a0e4-383ca6abfd4c.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 0x1300e08cb48b90e32f954500ce4b583dd61654e4e86b8b1c6073a25e31be470d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ8LD1961674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc67f79687bb5b6d50d73989f73612ce2a8074a7894e3e43a15ee450438a515. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:20Z), 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/QZDA51963126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d852dc2725b800c72097238c765182bd93bdfd2f95c472213e9c3e2286132f. 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/TCAEL1914191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06945e54165f4f50db9b8f1dfb2f5ef9025517b2ae36fcb5b83d4a313f09fb81. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:28Z), 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/TCAER2091182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91357783ce503a11edc31a04feb348ac36eeffec15f2af42e2f10ba49424e5c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAES2082108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a6668f097ceaca2a5463dd5fa669493f8a66a0b06b9ab44cd656b3f87a48a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGC2202812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c5971c1e24861a99d685a83483028309d4875fdd9dad56bd673efdc0f19e8. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAGJ2273114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea1789cb11914072cb8fc8a987bd95012fffd9ff9b6c6f6fe6f94af62900940. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAGN2298674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad17327f8962022a764519db8e746cb904919e4f1d67a10b4af5fa215165df16. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHA2388045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205321d18ee260ec1fa32aa8eab81bb1dbc727e6f622ff6572fdee7c9e0177de. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAHE2336776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f84c3ec3ee3839b511029e9f43e990b5017c764499ad4a91169b652220ac55. 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/TCAHI2385444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408195ef0c1594a9f117d35af7b39c6d684797eedeeca5a4609514f92b5b854e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAII2416232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6519a302a12ee0ebe3ba82fda1fadbc372483ad8111e429639f86cc8c37111. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAIM2491213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f9d5c11839e33061a67ed847d8521e20dfb4e4610f8a89ce78cbbc19b83ce8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIZ2464247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6930fca736c68dc9c05a3935bc99deeca6ca99826e27c0b30671ec8d3f60e9b3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJF2581570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3595d083ffdc61cb06d11dbb14e78c499a05300cad123529c8baf7f579992d3. 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/QZEQU2501141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0911da38c48582da30957f2fc0444149e3697eb6f63fb4276dda820bdde6d11. 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/QZEQU2501932.