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 0xdf252d9e01f453067b492c8157ebe53a7af5df98b2757ae740d13a55afdc75bd. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbfb2b57-7e29-4706-abce-8a03d9975e30.json and https://artists.proofprofile.net/proofs/artist/dbfb2b57-7e29-4706-abce-8a03d9975e30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Festa da Uva 2010 - A Festa Que Encanta o País
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 0x3958fd6e5a4a013d8c002d4ce7f7d2bfc082c9b60860251ebcd801d5c88f77b4. 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/BRACT0901088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb29a8f620e7130ef16f03e18540e03a5816c8f715a9b019acd383e298d0db2. 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/BRACT0901090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c77bdbdf71f370778cbd5e00df823c93713412a2c613ab778fd353da5ac5e. 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/BRACT0901091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96530bfe2bf1a335a200af8e9333b7dc00ed78e2d73dcb4bf90befee1049e179. 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/BRACT0700319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c41cc1c6360ff068eef9ef24b2a2f95cef520c8f250e96c6d4fd5399e1d92. 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/BRACT0600412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8204aa385109a2e9ba5e0f3b4091a8f5d15c37a07ff0a33bb941f5f960c390c. 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/BRATC0400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc4f88812674ac5249c0ea241952323aa2d035446c494b32310c938fdcb66f6. 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/BRACT0701636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794b53a8eb1370fe5452f03c7d7450cd8d82db527e7f7b74d1d301378767942d. 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/BRACT0800581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b90a75fa6d2c50d28f9d344137b71dac64468c0d7ad52a2b6d1cdc51decd96. 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/BRACT0701649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cae0640f5054e5331e8a20e94e2e2b99b044dafa68b0e880632f2cd7f4acd1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRACT0301052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f850feecf4019f7b24564c85205d75eadd7d2e06587fe83b0480c5e6e05a0a8. 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/BRACT0900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828e32cd8fda228b6b253c8a098fc5e95c1787f4369592dd7e6bda295936c371. 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/BRACT0800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f379c2c7fe04320a252e0766c9bbd93359bea680b7caa8dd1b257cd3f7990fa. 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/BRACT1200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ba9e35ca6430c518a713f4f4a85d97e3a7579c37cc439480edc2b37f6bb037. 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/BRACT0300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931599c31d92abdd549e5e5f431f6c9289dd881bcb075a85bd839d9599634340. 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/BRACT0900494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09679bfb987f434429f3b73fb6502603f22fadfb7a01ab3155d59c3af6347ccc. 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/BRACT1200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a5d68b7b9991e1cb17e0b7a25f8f57c8ef0aaf9f59701d578060a3c8986b1. 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/BRACT1200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11532337669bd6293ac5b9088101e5d0a27acc303030458d7e83362841d356. 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/BRACT0300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e533b2c6870a6e189173f94dc214fddf7ea6f8dc15acc3e2f3e5a7d14612516. 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/BRACT0700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b69dbf42bdbb86b610d144543b0066031a39f94a251994979ab7ca66056cc. 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/BRACT0700326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7421d73089c2c24333f95c13bfa2bb9ca403644db234e6de959e9ba6311d664. 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/BRACT0800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d6f5d60ae8eb7adfd92242d13e8da24ab6a26fa0a56a8bde7e1fe6a338d82b. 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/BRACT0800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d6362b97b725cb3339e95319cdc5fb02fac5bad54512d09bb3860ab1f3b8a7. 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/BRACT1300129.