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 0xe1d4c9e9f8a52a46a618e3a5801da7011e6cd15a753c945ba69042d62573af33. 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/7b40f977-a58c-4750-ba1c-8089b500afa5.json and https://artists.proofprofile.net/proofs/artist/7b40f977-a58c-4750-ba1c-8089b500afa5.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 0xc2b923559aab77bf80f7563b6825e8497a212e45de85852f14bb2699c912a39c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BXDMJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3c46a56c9ca4896fe082e32be94d32600d96f5f741b86354dc2707ffc3917e. 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/BXDMJ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d58f612bef95d5018535f7d92f2ed94b8b384fd39a98062485e35f9ca2e26b4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXDMJ1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9ac4776974ed39889130a11d9aa59e6bac93966cb227a1e8def9479ec6e961. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXDMJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b1cf3f4f318563cfb7066a53547dfb9ef3595c4c56f95f6f13730822a3b597. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BXDMJ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670a332e38783e88da696aaacbcd42561acc7a36449039d663e4a0b334882949. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXDMJ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743c9fdcdcce6c002ad2d328d3c9bfbfa3550069e67fc8a2991ab964c1e68c6d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXDMJ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555468b4889cba71dc3db470a4c4d51366eed94b8e69b636ba8d693991ab5e9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BXDMJ1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0177f10f0cadbc2132e0acfd656a4265cf4de4be35a75e0aa19a8c8dbf757513. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXDMJ1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1170fd0999cc896bbf0a58d2508662df3bd0345bf9ffc0d2bb62e9dca5b45770. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXDMJ1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c73f726ad41facc7bcf549fba47403d3c52cb705e3b98d622223bf0741e9ff. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/BXDMJ1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ee3f30de42fdc41817cc41dd952870ce2f6dbffa6d8b46853f98a33150b811. 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/BXDMJ1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe350ec4e760b3c51bbc781d2e71b7659a45c3975c1432a56917c91f90634fae7. 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/BXDMJ1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c2c4d4c0e4aca495bbefd3e1c904add1d4d13b5e58fc4bcbf9d531da2df72. 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/BXDMJ1800014.
Samba Social Clube - Nova Geração, Vol. 2 (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc254a39bba3293d526d0d837fa39fa6e051cc86b3ad94b03020652464667a9. 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/BXQEE1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6db72e8f19472078b6579ed143efd1b6baf73def50509d04edbf3e44963f591. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BXQEE1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b0d244b2eb2aac9b69e5846b54e45b54b63891f4146ea7c42b41262ec05bf. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHZ51989902.
Samba Social Clube - Nova Geração, Vol. 2, Pt. 2 (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028884157744036b5353ac65f8a3b97189d3c7f2ee882b33758f9e28c794f96a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BXQEE1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f2f4226b25040e4f55a4a3a5762c63c3c9e0eca6dd34ee201e260c9e527565. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRPUI1900340.