Accordions (from 19th-century German , from —"musical chord, concord of sounds")accordion, entry in Online Etymology Dictionary are a family of box-shaped musical instruments of the bellows-driven fre
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 0x75447443bfb2f0d76608000d0afda34243d7d626b1bb6b86fa68102c0bdb65b1. 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/8dbab5ea-e265-4d91-93ef-33f752faf2cc.json and https://artists.proofprofile.net/proofs/artist/8dbab5ea-e265-4d91-93ef-33f752faf2cc.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 0x56daa6e1623581b3baec555346a9f63a866393a3bb10db0effa15f0ddbf0884d. 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/FRY510883219.
Accordionify - Top 40 Hits Played on the Accordion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef008421bdac62611a5c7e3b841ee4c7acc1549ab8756aea4d0280ce47c9b9. 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/FR0W69998736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faef735e8d88b3affe90aba1e70f9f65a36dc3d3824fc2ff0e3515e9356b66e. 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/DEMF31500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb717b2cc269550337159afe6309308fbd5b6202c3da310887a5da1376ceb10. 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/DEMF31500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5509b9c7e6cc032272fd1b5a2a804fd8cc82321344d9e20889fb2ca7baf79b0f. 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/DEMF31500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de56c1d7f0c083d56274d102083acfabc9f23155bf12e4ee157f5272e562e15. 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/DEMF31500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cf80211b8a7a7df50331d48be84c47ddf855cf38c79dd54cd7db8934fafa67. 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/DEMF31500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794948983e9104ddc2cc664d6e37809cdf3c49c2459620d9248e0088d2562424. 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/DEMF31500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047d986f9803ff7f22519a392d113f0dd1a2cd7b9a802b7d01b3c2a780ddd32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEMF31500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b22df51a02254be538718f8e1907f3f18850cb5dbb5e77fc11af833845dffad. 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/DEMF31500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4770eb36ad264124ae2d118955948790f89325074bb9715b25033b2b9f6e85f. 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/DEMF31500269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82777c810ba572e0f0025f2b01e3f80e2db62c4074918be034aa3d65027f6ec. 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/DEMF31500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1dd93c9b7850cdeb97a3c3fe167ebb09cc701b98c54c5307f3f0273f1466a. 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/DEMF31500271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0806d64e84a4f69d31fec5e08f903ca7ca6af3c60d6289ff9e7b17523866713. 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/DEMF31500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc40f3a0570e6ef75a5928e8d042f68741e88545c5a0899f36438f16d9a0cfe. 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/DEMF31500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ebbd202fbea98b0262abe5f16f31b2103c69ee90e0933442d9488d0d65159. 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/DEMF31500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd745888a2b64f49c8dace31b529337fa59733f5e618aa06ef1e8a46d4b5e6. 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/DEMF31500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b576a0bd573f8e20efa373c300cfc573e9fde086a3b3d17231582c5fd4f519. 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/DEMF31500276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf877e4ef3dffc949b87b10041f629af4b6672cf60b4f9d5b488df6647fa3d. 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/DEMF31500277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893fbceb8fb3ee890167cb58d41024304c22e25a3c022a09132d7f3cd4d0ea85. 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/DEMF31500278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754d61a5d6f228f6a53f5287f8a5aac2abe1312db4066f1245ba045303d504f9. 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/DEMF31500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ccb0f7f1d2e51444646bd5a3bed2dbf623a4930628bc72fdcf31089ea5f877. 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/DEMF31500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbb6b7b28f9186cf4f19c22919c12a38748154aeaa4a74c2c4dcb29111baf77. 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/DEMF31500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b2e0070bcc92236b5b5d61ab1cc57bafc30cb90b1c3c8d95bc7ceeff64c40. 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/DEMF31500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab6cbcb5178ef62a16bb999d5e31ea1203ace14ff546a2a961487ea617666d. 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/DEMF31500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474a18457da3565a9f725b831e0a554ebd95d5d05ce3aa503c70175da0d1722. 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/DEMF31500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ffcecbf0df3829d1d618786bbdc9f8d9a78b90c6e7d3524420887d7c75ebb. 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/DEMF31500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee46a51e706dc1b308e9297b14e54c7f843158b8331dae044d48aa27dfff9ca. 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/DEMF31500286.
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