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 0x12107bf0258dc533254bb91458ceba10663f84282dbfadc8409c1422c3d1a58d. 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/9f4d5956-0dac-4bd4-80f9-f76e9b214391.json and https://artists.proofprofile.net/proofs/artist/9f4d5956-0dac-4bd4-80f9-f76e9b214391.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 0x9b5cf24909efe18b97e4685833b5df23b7ba637db0815d1d1ab4f233ecd76304. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BCHFD2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239408c6b854d00068737ff1c4bad544808880e8466dbe45956ff9d90b923c7. 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/BX1KG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde6e4cb81cb80c533714e252f12e27eb1b3e51200f02a6e69aa6e1f77315d6. 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/BX1KG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7218e6a216941065680a3db515d59d8b43aa654a22c00f119503fadecc1300. 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/BX1KG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2df88290f53024a53edbcddad38a9c5e7de03c21ac7b679409a004a04c35c. 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/BX1KG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4367f63274ada1cbaa7b65249e21fb8dedab3878a1498bf7b0ee04e22df3be8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BX1KG2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd26d1fb5d9ebf1927482c28548d88e6f2bc4ed52fb2719279bb58fb63fa34f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BX1KG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239408c6b854d00068737ff1c4bad544808880e8466dbe45956ff9d90b923c7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BX1KG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd26d1fb5d9ebf1927482c28548d88e6f2bc4ed52fb2719279bb58fb63fa34f. 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/BX1KG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4367f63274ada1cbaa7b65249e21fb8dedab3878a1498bf7b0ee04e22df3be8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX1KG2300016.
Da Ponte Pra Cá #1 (feat. Caslu, MC FAEL & NK da Grota)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80006b78dcf2a1578ce38995a0bc258df02da60be8d644c9916e4cbc47129c0c. 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/BX1KG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc6f6b5bc289da93cdda034a5b059c9fdf7260e8be74b2176c321377abf1a0. 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/BX1KG2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2f23bc5a5a23b2a97e00375f250b0c2a3b3091a88bf3521d53f6d0272e49a8. 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/BX1KG2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93583a87234044f191e5da49601f8be56860223de6aada5e5f4772c9c3bb1b9. 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/BX1KG2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed908cf0a90c198d116530845f6fa2e13af7e63d462c40147ba7c811c36c06f. 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/BX1KG2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e2d4a8e03e3605590896d9ba6f2d322fbfee3e1282dc708b5b4614734ef212. 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/BX1KG2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc6f6b5bc289da93cdda034a5b059c9fdf7260e8be74b2176c321377abf1a0. 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/BX1KG2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93583a87234044f191e5da49601f8be56860223de6aada5e5f4772c9c3bb1b9. 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/BX1KG2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed908cf0a90c198d116530845f6fa2e13af7e63d462c40147ba7c811c36c06f. 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/BX1KG2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2f23bc5a5a23b2a97e00375f250b0c2a3b3091a88bf3521d53f6d0272e49a8. 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/BX1KG2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ca3ffbf264aafdcc74378d3e9d4083cf51e6f69adb0b0c0e464e682d5ff3d7. 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/BX1KG2500017.