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 0xa60c64710ad68e0f2d2619eb7602a9501c11b1509cbea7dd5420a91f668f7131. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfa4f0a4-0904-4174-b231-770a53e2adfb.json and https://artists.proofprofile.net/proofs/artist/bfa4f0a4-0904-4174-b231-770a53e2adfb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Siete canciones populares españolas: IV. jota
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 0x29f1ba4a26350dd61ccc457fc63e790fafe41b0ff148a29aa7702f057adfb5b6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:13Z), 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/FROV61410401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0521d11f655a5940dd2f1e1355b299580e9cc64c04b2673bf050015e6cdafcc1. 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/FROV61410419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bffe3d8f6e94aa25bfe010aa934078bf6810ef4b656ca19cdca2d8f64931d6d. 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/FROV61410405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b2a0eb1a069c0a56866c969953abe4faabede2ae39ec62022183cc5f4332c3. 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/FROV61410411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c188974cb8b3f5d93b08fc8bb38b691faf4d02c93593bc8e0c2dd9e2814d07c. 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/BRWMB1800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda424ddc967cd15b97e10a2e4112115d33ff5f302aab503a5098be2690303b41. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRWMB0200102.
Clementina De Jesus: Convidado Especial Carlos Cachaca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab726438a9c4c875c2c6c0ace1f3701d789816d0d8654344af692f451a46d7. 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/BREMI7600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8768aa939e9e021a770ae18d4b4ce7283222c52d67e3d9b1a65a0dbb9f78ecd. 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/BREMI6900575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aafcc9acec8b2463c5e328ad76de23b94a6ad5824e89f508b044313a1d9d0b5. 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/BRUM71501425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7942769e22a5fc4149835ad6771e46f6087b09c1729a92f31cc8301dc8e8b18. 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/BRBMG7000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ae4fd26efc070985258d4f22aae776873ffff3bec9e25aff655bd18598861. 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/BREMI7400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b75ba5d6dfecb4ab9d8840c2f7dbd3e48d104c38008407834786579b545e65. 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/BREMI7400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcd34a3373d98ba4d1aad051b4baedefdff6d8e10f16d90ab0f1dcf0f6c3628. 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/BREMI7501051.
Divina Dama / Quem Me Vê Sorrindo - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d0f9efd3ea0f6356e00125bac5311911487a6f2ec813bacd6c2b9ac371f197. 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/BR2RA7500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fa811f504f9678cdfe75f91f1f6be8575b7d88f66a3e30956017cf9c80b14d. 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/BR2RA7500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b2be7cc4301588efe67d81145eb4b9d5bc508380e0e25d5fa426f36206c0ed. 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/BR2RA7500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228f98dbc9570a9e7a3ac8561c92d8dc5fb1e70ec985addb3598266df6bd3f0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRPUI0600077.
Não Quero Mais Amar a Ninguém / Pranto de Poeta / Todo Tempo Que Eu Viver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96188c23f321e70a55dfd574b496eb0a2967b6c6ecc4a27102c442afbd9dafa3. 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/BRPUI0600081.
Exaltaçã À Mangueira / Sei Lá, Mangueira / Mundo de Zinco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95088569326d553af5856e3fe95d1400fecff16b51202baedf2f0f748a1dbaf. 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/BRPUI0600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca0e5952824d6ac2fbbe5caf74a697f05a8a644176436b8b2e2bfcd2ba255f7. 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/BRWMB9701404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddd634d057a4005d7bb73070d78fd1785c5a694fd9001b0bd8a81179ff482f8. 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/BRWMB9701405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e364ecc68773cb8e7d7e6abf709760d4ad2c92e2e8e359db104bf2a4a87b62. 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/BRWMB9805326.