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 0x39dbbf076d9d8f468ef95edb1f558669ae431be95de1366562cd6dbc3d2fee1c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aac3c037-ea4a-47c0-928a-f63c1aa48705.json and https://artists.proofprofile.net/proofs/artist/aac3c037-ea4a-47c0-928a-f63c1aa48705.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 0x7978a3f50013c7f3ec384bf94717413cd725019f7a1d0ecab1c18a8b786070f6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BXIQI2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa50062abdc2aed0dc42f04448f005ceb95a3bf273ff72e2d693cba3de4e1666. 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/BXIQI2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73262765cda4a663682898b48b13dbadbffad05f3e00c2130486e60fe5a3ee76. 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/BXIQI2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee778219c833a40b3057ca24458b9b8241f466a733fd8ab50e604e24db3204e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXIQI2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a254fd2353b0ae8c52f91cfc7a0b3758dfd3250cc29cd6c2e760145869f4545. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIQI2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2846b4d7e668298f4ea3a1ffbdaf2bf1152eeae115d7cacacbde96c6495189. 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/BXIQI2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bf64897a1fb0b0b1e09974f3fb680dcb8b54fdeb96b2356cfe67a42cf95f0a. 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/BXIQI2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7978a3f50013c7f3ec384bf94717413cd725019f7a1d0ecab1c18a8b786070f6. 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/BXIQI2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57641b434a69afec7400849f7157c7b1fd46e45df1bbcba12f01135df975cbc. 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/BXIQI2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3095168dd829d075ef1259370b65049d96aa2cb3d5680dbfe1138ef72027fbde. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXIQI2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d8145c709f50336299666a59f46608fe634a5fb1411b32daf55ab1384ce645. 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/BXIQI2300004.
Nunca Perdeu uma Batalha (feat. Miguel Rodrigues)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135f23c4df070a6b0ad44603e4cab33c9c7c505c0a18b08a63b645e062ec4cb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BXIQI2400001.