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 0xaeb9778e1cb8f9202debebddc66d9618e22fd6c89eef45da76f3eeb07f2b3e84. 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/6587f245-32a6-4027-b39b-47545660a861.json and https://artists.proofprofile.net/proofs/artist/6587f245-32a6-4027-b39b-47545660a861.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 0xb2cff4cd25236a139eedcb2dd2b65bd9fbfa899b07b730955d7535bad80c981d. 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/USVR10700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc0a941390cadada69d9e0757eb714f6491aa5cb7b400982cd5dcb461b0b62b. 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/USVR10700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259881b26eff00608d1c8da32f8b7f46af2e0cbfe2c3968021833e4373dce07f. 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/USA370641937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65506b08f32d1f48ce5d31a77e0a6595d86440d838e66138973907b5685a85b7. 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/USVR10300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f374533824ec5dbc79c392d27e9ffbf86a6044a390e937025ef424b700c9747. 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/TCABW1409048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b151f22928199415c70275bda83d8d8087255550b7a59cb36287caaf39689c4. 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/TCABU1467370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c555e1a5de75779eb1a9cc03c21fad2972619c6d960e92aed12fc4d012071. 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/TCABU1467382.
Talkin' saxy - The Best of Alfonzo Blackwell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d213cda4a5376fe71593d9228fb3ce936674da28cb5c5072129b2d8716061a. 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/TCABW1401477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5a6834a4b25bc0c618396d631ad9f42be2ec6411b2b1c0a50d79b3a4918199. 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/TCABU1454062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bee4ba9c78d3961f8e68dddd50ca02d88b2f20fad80e971c38445d75e46783. 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/USA560554217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb00d8a3073e899a936e128d52b7df648500f24a97d129113b4649a422bb1e1c. 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/USA560554220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d366ce56aed328164cdd013b80297baa92665d08e0ff3e28f0944cb84cf69. 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/USA560554221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd424fcdbf2a3b11f2d295f6ea3011ef96adb57adf9b42c02572c4d9386a640f5. 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/USA560554222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbcf1b73973904fb703f724e18ed2cceafaf5323698d90402c2b97aaf1dddbf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA560554230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b1f17552626cf54e984ae04dfa1345bffb740c7183e6acaad2e07a3e7899c. 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/TCADL1805956.
Sweet, Smooth & Sexy! The Ultimate Collection of Sax For Lovers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6607ab259eac6c5eeedf4c185bbe0bf4db6c34d68317dc7a02fe4cc3db40b22f. 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/USA560767018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57da911efd69be81e9bc2a9ba5a0dbe2d9d24e0a817613028c1b6155de376986. 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/USA560548632.