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 0x19327db763d93a45e7c024bb8d9450c3403498f7270fa1031c7daef7cad4bf01. 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/275e5fab-fcf0-46ae-931d-4b1810112d1f.json and https://artists.proofprofile.net/proofs/artist/275e5fab-fcf0-46ae-931d-4b1810112d1f.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 0x94b4d19790bd66eed7077a318762adeaa63a5966330259c2313f5389d112b45a. 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/TCAGD2279057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ff2c84b98339b67dd39bf0bbdf9923e79a36d132127d946277cedac7257642. 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/TCAGD2279059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f134af7183b98a5ea4e0770ed2745e5c08769f01d68d26a3fd93699ca08304a. 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/TCAGD2279071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4935d68e83e7db3ee76354121bdae05be56a4a3143bee3a2546b18fe1c8791f0. 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/TCAGD2279086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b96da53b0f023670ae4c3e524fc30f0094cf008581af0c10b94e8e01377e4e. 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/TCAGD2279094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257327272976b60b945d9fae703c003b59bd552cc6075cbc6ada73d3d3197907. 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/TCAGD2279099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddcf8f7aecb9f9f2bb05eb6bc3652725026c90c1af3efa468236615c15a60c9. 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/TCAGD2279104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd949cb9c7d58522cda14659cc176388edabbf79d63ca17ad62a88b18e77d01. 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/TCAGD2279109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fd5472d79f6959af9e71497a79d08ee4284585adc6738d0cb24de952eabc7d. 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/TCAGD2279112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594a85d718591584654b61d0e5be7d8ddd6996202e2d0bbf222c5f00aca5b6f8. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZXWC2300007.
#Siemprelosupe - Acústico [Alt Take # 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ded5e4119adc1088a14f7c1f49ddcf3152cc1095f74c917c7e31fb870098a9. 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/QZXWC2300008.
#Siemprelosupe - Acústico [Alt Take # 2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3029e4e898c02ff8d1a6c7c37b94ba8b0aee4d7972d8998c218ab88f10c9df6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZXWC2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaf2a47ed39b77e57cbc9476b1a8d6ffdae0367d85160f24a5141e4197f9f77. 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/USCGJ2121359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41d069d2ff6fe26366788c44b8779fa2e80ffed5c95fcbe83afcbf30ff41ed3. 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/QMDA72216130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8730ea6319784f1ca1f692bca39356cc0a51b56e6e9f6794dbd0b34060f2b. 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/CAOA82100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8730ea6319784f1ca1f692bca39356cc0a51b56e6e9f6794dbd0b34060f2b. 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/CAOA82100061.