thumb|300px|Ernest and Pauline Hemingway, Paris, 1927 "Fifty Grand" is a short story by Ernest Hemingway. It was first published in The Atlantic Monthly in 1927, and it appeared later that year in Hem
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 0x89b3d07d50097c6fa3309a9413a81c4bd1e5d49e92dac13f75da5e08688ccbfd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5c45b86-214c-4568-9476-d81d13850eae.json and https://artists.proofprofile.net/proofs/artist/d5c45b86-214c-4568-9476-d81d13850eae.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 0x9871701b432ff110f232c2a12b7a0d4e787aa831c7a9531e517a4caddb21570e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZH5E1977797.
Weave Me In Feathers (Fifty Grand Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ec5d97ba9da21a6f1addf30466181a082305d5494264e2c54380273921bbcd. 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/GX4R52387753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d4b1a35e753cf682101d3bfd5b921bb5d7fdd84d720faf590d3baaff22aa5b. 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/QZK6P2301903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266eca831df9333be8f583190eac16416b77462d4dd340f2df1ade038fc40744. 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/QZHN92238271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a32f2c55deb825e71badc07de1af3bbce79903f63390c6c2bdc05f30ed0ce72. 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/SE6I32213743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d43910456c23ce655954dc22528c4f52750073d84f69ad94a12d2ff28b45065. 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/FR10S2278236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd912c2855ed1dceb2a4b6aeda1e623423690588fa3791b72f39cffd4594d59cc. 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/FRS182120253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bad724eebd8f96122afdce1597b6a5c319fa540e641208699a861de72478b4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:33Z), 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/QZMEN2129605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3331db547f88fa9dad9b0ebf6bb1860146d92e675e9aac6f5491bac1f7563444. 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/SE6I32183393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a29b574ab18e13b366b66de0b9cb61ec3f874b30be08d7d509d951c0ca4f8. 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/SE6I32183395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9aa86fec01540dd7390ad5aa5e3a623c7751034a34f30acd1173582ab9083b. 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/QZHN91979373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61deed22949e465f9d04735776797692c1abba4c8deeef3941f5bf52521dd0. 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/QZHZD1923414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0d62f502be757494fcfff0c29e534b70cf1e39e6cb6e98f882368616fc1a8d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHZD1923403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605890a578d49de1dc1d8bd58be89c140375a45fcb9a2a1f4cbee524a37e9dea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM8DG1959907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251bb33c75f8bcdee856d7fa458f1b95901ace98c11ac6e7f1608453e7c22740. 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/QZ4JJ1804118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3d200e932627993edd235f267c5e5a73090dd39966502b2b74e5e772332f7d. 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/QZES51886902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d73612670dce7e884a4337897b8aa6073b9f2b0d97934ccd16ce8047943da6. 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/QZDA61874252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679cf008383f17c435993434a107cb91b49d6c54c4b7f5cfb0df35d8b11bd1ae. 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/QZDA51877286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cdbb5d7661412bdcc8680903bdc8b917a31ae681fb9caaf4ef72ddb1a0a5fa. 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/QZDA41841983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0398f25a1f686c4ec57f63f77d8c4208cd9010a2ec8bf126523923f278799ce. 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/QZHNB2366702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f3b5426eb64f647afa9e1f9b87383a2335d7097ce923b42382b539b16ecb44. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41876441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9680b558c9a666810c44ad6cb7bcdb47f4a9f069a819aebd9d8ec9e691c6a324. 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/UST8K1428686.