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 0xce448c7b32e8e279f365d6df29b863139332ef9f02445306f61419b779823ae6. 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/15172581-d95d-471a-9d99-513ce8191989.json and https://artists.proofprofile.net/proofs/artist/15172581-d95d-471a-9d99-513ce8191989.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 0xac8903a8047d89329580173c5c1e91aa631deb7fba9764c9fabef5a61a578e21. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEPZ71500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5ff198e0eb6a111a1588eee1d1d01d5caf64e32e348e97c79cbf19d52b34d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPZ71600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e2b8487a42315860365c8f821ae5a41ca954d031396f024771a9c931fc5528. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEPZ71700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dcdd8e41ed81744b05470ef2cc5150aadbccd2e6701e763e8d44269f3ee179. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEPZ71900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827517e8b79d6804fddb8f3a1d9daf4a4f5a13f7258c9f582d1dd66a36752c94. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DEPZ71900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5fd6e077509cf48f31cfb52249b156f3f936a8658891898b6147aa9b533199. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEPZ71900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4910f72537d52c1e28f1b75ae44da449b2e1b3d25377c5b85dd12e6f2b6a4ea. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEPZ71900073.
Shell Öl / Bora Bora (Dringeblieben Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b43bc4a2ef9bc320cec3ac36f098d36710c3fefd46168fe99b08baeeadfc79. 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/DEPZ72000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb86eee0d6c242efd4be3e3cc4d0810a47605b8daea7c07eae97e26925c4241. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEPZ72000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64d83e577a413470a2432e62d5d2d4e78e677efad9abfaf35a4c4495f82735. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEPZ72200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5fd913b37cd1b66d0ccde488469cf08ddc7cb4e3b724b1e1f86477752c570. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPZ72200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161d1e505c01a2850d5158d08862f543263737bbc552e6e5035945518313a0f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPZ72200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edfcdceca18770137ce2e5e20a2dd74d8af7a73dd602d58f912ed748399f41f. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEPZ72200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf890d93be2b98f4b73ee690bf899b0a136464216c0fd129309bf33e90671190c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPZ72200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb245a580623befef8f9d17c3c4fc448ed15d0eabfb2697fbc6f1cb461282de00. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPZ72400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b93881c3a810ab73746a64b45319e36858184e00510552feae2f92ca02d7f8. 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/DEPZ72400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d57318218f7f0932a3fad8ab033f816e83174824ec2545b39dd6e13e3779d1. 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/DEPZ72400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb3501b7e17474cd25ecb1b3bb45b26888dd293405b9c77546312b402efa007. 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/DEPZ72400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba8dd570b5627f60ebf35e00e7bbbfc4967672c256919061867ad95d65b7b1. 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/DEPZ72400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0986e8bd6b1b1edd952c7a08ca1fceaea880d274804d2ac32c68badae20714. 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/DEPZ72400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b93881c3a810ab73746a64b45319e36858184e00510552feae2f92ca02d7f8. 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/DEPZ72400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3620ea4d84065e93bf24ca3b8900b17706f47c042b44cc50e2b6966d461284. 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/DEPZ72400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37abccc62e6b75aa32119b9a4e862317ec2132a8123ad326dae086b1bffa211. 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/DEPZ72400135.