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 0x6fc1623cb53db4846306dd79629a4cb0800adaaa5e24597c7a7c39142021c239. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42272d2e-c86f-4ef4-a057-b7f4a7e3d197.json and https://artists.proofprofile.net/proofs/artist/42272d2e-c86f-4ef4-a057-b7f4a7e3d197.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 0x4ef0259594838988d0fc3db2af5df5008c82f58179485702dca3c7c1e54ea2f2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM6P41789851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866de9fa090e6266d09237f32ef144ed1f71beb93f82cd48609955bc72c83247. 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/AUKDT2300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfb78ff181884fcb0ba5a63a69f1cd1a4b5c37ded1ee4b06d23a74b0a060df5. 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/AUKDT2300983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6623f7f0b6ff7a792fc5203ca3944e1ef555802cc5d28c9f664923dbc97bfb1b. 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/AUKDT2300984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6710ea8633dbcfcf276c2be28987a0c6441c68013680174ba6e2c61419a62c. 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/AUKDT2300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc607568e95af7817cd062a9496aa4e99bdd5234ccdb78440e75a57779b8106f. 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/AUKDT2300871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579859d972bcc1aef883c432a4e8f23c68cbfe3cb42a84dab3967a4a8f6b7bf2. 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/AUKDT2300869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3baa6e550e5783d7d784a356ebb8819edc545960c801f14458653682db576. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/QMFMF2352114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40c6c37973d6ee1c5f07d22de9037c14faebd5cac9572bc9393933bc02110c5. 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/UKR6V2311237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5fdf3bca930a6034f163aff39b6211e23c12e0fe893a6202884e1b2a65c8f0. 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/UKR6V2311238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b80f2ee1a402f55ffd4270eed7c54b971d0cdd22487b330b4b0f85177bc714d. 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/UKR6V2311239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c42329af51f61637de46e7a7a28b61e9dac5191490cf7f5083e5e58957f0e3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITK902213010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba77e529204b240518f771c584abd8078bae4f080ae0469e54d8f0741d918c1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMFME2129255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a6553780dd58a585439e61e8681379a5e4798ff624f3f6c1f6283de6441d8d. 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/QMBZ92190797.
And Now the Wind Will Blow the Leaves Around Forever
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4572893fc2de65a403297b66b5d415b297d3acf096c3a1f987cc98d29893910. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USLZJ2263056.