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 0x292558e55fe7076441ec9abbabfdd04d35a5a3704e7a7ed7c3a6fa919d7d8751. 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/b2d8c810-650b-480f-a591-e6dce871cf42.json and https://artists.proofprofile.net/proofs/artist/b2d8c810-650b-480f-a591-e6dce871cf42.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 0x46379a98a76a190ad0ac2bd35f3ccc77cc8e5b8b89f74ff72044974a93b24a63. 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/UKRMQ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a17874b9aa572ae043232d36908f95ebb0651392936ed7fcdf4da223a4343a. 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/UKRMQ2301325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ab9d1e932b985784eba1246bcdbce0169a6255fbb7938a806212815ea6fa7. 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/UKRMQ2300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d557e6e369ed24ee5adff52c032296593e64634405ff1ee7b0618f8941f09f0. 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/UKRMQ2300599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129331d278d53a99d97a34e2d4a48d60a1b2b9ed108febd33c467949d85ddeb2. 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/UKRMQ2300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22a8d54031c6216b4d9e67fafa9f44821eed3660d26b7c3d9f8ef7aaa2ec524. 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/UKRMQ2201538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c434262a744260427cd73614d67b86644f95bb24ac7bb786d395473f0e3bd5a. 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/UKRMQ2200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf137c8802f2bf3722f7379197e072f9bef31a3b0bee401ef4e8caf96c1bc6c17. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:57Z), 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/GBKQU2264863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4318d563aa205d3daf31b06afc5a87879c4e378589eced37470f4bf0b90a920b. 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/UKRMQ2200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ce8ad1f1538e4bd069361b64ea564e6cab175ff65f2135e916a925631f3c1. 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/UKRMQ2200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa03c2a562d0d33ebab53a9b54f85262325bc648c9ecc75444bd8a6f08d7926f. 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/UKRMQ2100824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1092e6951908e19b66cea799a8573d746631a62835e52118441113d031c455e6. 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/UKRMQ2100665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bfc1d28b6d78da92ed24d7061f69c83a59e631c01a702e428a0ca3e9d0fecc. 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/UKRMQ2100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd028d7249ba2cf183af532ec7876eb39c4027fc1645c14126f1ba5a5c1099a56. 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/UKRMQ2000972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641655e5eb5e98ea3162928f8ff2726eeacdbb3dfabf43f69107d171bd78612. 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/UKRMQ2000973.
Sogni Progressivi (Andrea Ribeca, Riialto Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470a32f3e61ace3cbbec80486ce94f1d695aab0d18adb3e237e628c8af21dc83. 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/UKRMQ2000649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257467d00c38726f948d7db7840e985d188ed582c80672484c6cfaa8b5fa7b51. 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/UKRMQ1900891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c0808e4360fb496298135d0619154541f76e763b722aa2f6a94cb42ca7fa1d. 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/UKRMQ1900455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514936afeeb2b44c27cba903ea97ec2da0cffe5382b1d9deda06c6ead73609d. 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/UKRMQ1900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95df4940fd7a0dabcc47b9e2637243c4ee5336267931036c286f56012c85dd17. 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/UKRMQ1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e517905aef66ee9ab2b5684033c75f690378a1cfd94ddc91f93caeb80e35817. 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/GBKQU1727956.