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 0x5f8a0d0aa4ba91cb5edc01a1b29c971918d32baf9de146833b5e30065be86318. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/508615ac-151b-4c93-8f1b-43b71633f1f0.json and https://artists.proofprofile.net/proofs/artist/508615ac-151b-4c93-8f1b-43b71633f1f0.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 0xe84d4b887577e6ec4605b328a48b6ad477c1c59ece1a655470a9d617307faef4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEM501300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68784582137fc41543b9be585be56f83a01cc9bcce00edc9fe93a97f4f57ffe6. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/BEM501700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd38d8df43fd2b4b6804858c5bd7bf66f3b0b6c31b35574b0c4e1f5db7a6c28d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/BEM501700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c7a05aa18872b94f55afd27450198189081fd7b5c43b817423221b84f1793c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEM501700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458c14a025a2eb6054085b0f83dad8f2edbfc1e9d40338c70b3b208c93c6c2a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMJG1800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f37a87f26d4bf28b8cff5f8dad58b617dfe6e787b0462f7d739d0d811806b0e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BE5HB1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a872100dc464c71f68c9d04fa82f59be1cb4dcebdffb213b2733310ff3fb18. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6P1985753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc53847e08096c4e027dd24dab4a0d9b84db93e8d3d26ac228dd8c2d131f822a. 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/QZHN62105329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae46443134487cf92f29a26d0edc0046dfb52789654bf97523c65b45ca702db1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWX2127904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cc7a1b79c49df182f7aedd9bae14ed0dedae458e74402063b47e05a88f031e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGL2258874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e2ff0bbd932bc63308d7f790b6250442b15ab4d78af6cb07e88a737c184bfa. 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/QZFYX2347908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce57c5ec7cc6c26f00d642521e18b4499219e03ff0cb22dfe8411d78af8fda14. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZFYX2347915.
L'attendente Cancione in bicicletta (Dieci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a000fd7ff6667efaab5e96aa942af3ed0de41099b5494a4d279d4b582cdbbeb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZFYX2347912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc8645be48f4dccf89f9f33b946b5c6b48c5d1cb5bdb0730051a3ec73457b60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62009499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51419ce9aa1c8e9598dbddd4870e458c3b813383926fcc196d43599dfef58aa3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTAW2504195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f83772c53f733bd0277b26b7f976347527545860c9c2ae0ef6cb5e6d91bd094. 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/US6QR2300076.