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 0x6b9d0e3c597ac860efa21207ba9f9ca6fc441827ed1e2c7ea14d42ed66cb06c0. 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/1ae60990-c11b-4ad8-bdea-5f75f8ef4781.json and https://artists.proofprofile.net/proofs/artist/1ae60990-c11b-4ad8-bdea-5f75f8ef4781.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 0x5aa97d01eb4ebafcd50fa56ce3d14cdedf8375823d003357fe55530ee23034ed. 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/TCAGZ2320793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507e704291c5f1f229158883398fa03990a14e4579c1453b6d23bf3ed1e69cc. 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/TCAFO2117183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f5e0f74098e9179e36ef1fca111bad8b36fa2b48f01f671b92dd150cfa7c50. 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/TCAES2036503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e44332e9c512f8e77b889e2aca14a7fd0135d19401396f153d6dfde19e1855c. 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/TCAGS2378222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303f327a8b5899cfb4637f52b0a135cd368ccbeb8877ef3ea0e946acb3475e55. 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/TCAFU2194618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54daea33e481a2d424903703d63ef51c1497e4f30f283712b1810b8c4394c2. 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/TCAEO1939473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f08bd1b92236ec1ef99ad2063d8632560a76fc363e47f5d1e3ec6671170ed72. 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/TCAGK2279505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5bd3dcc3f8daddb5e21b18dd7a5be9ddc085df14c4fca37ff7d6e6b3fae0d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCADY1850298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcc4a1da82e2c79b71f44cfdecbd9c7b4b6795b5809c65172fe2d472eaf24c0. 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/TCADP1800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071a068db0504deaa6844785e553c9b283872f512ff017d1183154aeff447141. 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/TCADY1812117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69defdc855a973bcf77f1523b542219b90c5464f4dbd0901c51cdaf6fd4640bd. 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/TCADY1812114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe502f91f21575b02d9b6a3c3a3f1175be6e67eec7907cc16eaf25b4c7a35ea0f. 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/TCADT1845289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7380ddedda76bb7fcc024429793d5d64173d2027b43bd5a2cecafcb25e2cd9. 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/TCADW1820684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357107ac1771bc74cbb830242246ed93d94663b8bb13e11d0f449c11896ec9c9. 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/TCADY1850283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89fdad0025a76e8ea657f5ee0bb200d2b93a55c4a5b04d32f9e39aa1a72a812. 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/TCAIO2421068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f08bd1b92236ec1ef99ad2063d8632560a76fc363e47f5d1e3ec6671170ed72. 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/TCAGK2279505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303f327a8b5899cfb4637f52b0a135cd368ccbeb8877ef3ea0e946acb3475e55. 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/TCAFU2194618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507e704291c5f1f229158883398fa03990a14e4579c1453b6d23bf3ed1e69cc. 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/TCAFO2117183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f5e0f74098e9179e36ef1fca111bad8b36fa2b48f01f671b92dd150cfa7c50. 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/TCAES2036503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54daea33e481a2d424903703d63ef51c1497e4f30f283712b1810b8c4394c2. 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/TCAEO1939473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7380ddedda76bb7fcc024429793d5d64173d2027b43bd5a2cecafcb25e2cd9. 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/TCADW1820684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe502f91f21575b02d9b6a3c3a3f1175be6e67eec7907cc16eaf25b4c7a35ea0f. 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/TCADT1845289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcc4a1da82e2c79b71f44cfdecbd9c7b4b6795b5809c65172fe2d472eaf24c0. 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/TCADP1800189.