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 0x948a6c9dc4c0038f5f1434a1389ba95b7df68a85bf755d2c7d045dea917e9078. 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/ab7a5d6c-5f59-4a3f-bbbe-229577422fe9.json and https://artists.proofprofile.net/proofs/artist/ab7a5d6c-5f59-4a3f-bbbe-229577422fe9.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 0x816899c0e3f38354fa10a33f1d5d4cbb35cc55b4a6fd84fdb616734cb78fbea4. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QM6XS2300783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dab505a6c4276baec49a508c3c67c4e8d64a03f954419e0734467e573207c7b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QM6XS2300787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c5e16c269caedb1bcfa3ff55083249379bbef220c3781ce8493e05cd165523. 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/QM6XS2300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e012d00f66a7d78ae16bbcec83eb9fd0554f10c49a9ad5d330d2833317a6fc. 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/QM6XS2300771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dcd3b7498b38ed4c5c0e8d91dd7299c1662a2f947af0a801fe2888da052432. 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/QM6XS2300774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fda83a84ce2a1963e34c2cc5d5c7d9249b163e12a752b30f1584b52db80992. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6XS2300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf704938b88d1932389b89f4c437b7195af1f9d3d1b4f3bed6a69206af36bfa. 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/QM6XS2300776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce45b8e5a65639853b7d4749960ebd30d3d77b7c4c7febb531125968fa4f81c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM6XS2300777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083bfd9081f2daa8d818976084bfed7e0fb6901d1bf716211f3a9422e977d87c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM6XS2300778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7870d69e80be2c8e61ecdeefb9bf8c266040d217e26b4b3a180aab300b1a3d2c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6XS2300779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d2c8c97b317cf5507a8f41da32ea7fa402374af97faa863882578a8b09c15b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6XS2300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148ca0e99dabbfada744dd5171148c5b04eef8451469356722b0329629231e4a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6XS2300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb98f22e4a857477dbacb5c5c913963f15f2d18c506c40f91c528b8e4d25e68b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM6XS2300782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816899c0e3f38354fa10a33f1d5d4cbb35cc55b4a6fd84fdb616734cb78fbea4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6XS2300783.
Another Celebration at the End of the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf317ff0b83f6ae768cd7999bf9802f37a10089f5351ffc7387eef91aa59a5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM4TM2300835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66934b57fcb3ee9abfc1fc044d65e1b3bc611c97045e0d4c0a8d2c4fdb3cd4c1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMRSZ2300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd488d6637b3648dfec52f667e294a9c20b5dd4860bd43d76a883b1ea02d7f822. 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/QM4TM2503083.