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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374d679a90c138475262e2390ea854be50c0391ce6ec0fb745db784f08dd1d7d. 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/4ff90019-a122-4c27-8dc3-33b74acfd52f.json and https://artists.proofprofile.net/proofs/artist/4ff90019-a122-4c27-8dc3-33b74acfd52f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad9d777a5454ca96dc78066bbb60be4d8b28447e64365a33a112802c344c52. 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/JPU902303487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7734ce7a7eee3c5ea8319f33d570c4ced10ef47ee8dbbf1ed3f0a9d09741a8f9. 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/JPU902303488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d08c05f56d23081579810448d0dc2e7536133a1281978c0cc3e35665eeb7b. 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/JPU902303489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bccac759b4e8af2dff2d49d1a4fcf546bc31ea11de5e887ccd6166d36af113. 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/JPU902303490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5afd9b525b1bd420ab441dae42cf13a442ded4c0880e82e9e28455fbeb53e. 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/JPJ902402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cb30d58bfd92e5d5760e38f5e268e01385a0c77dcf968e7445de77a2ccbad. 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/JPJ902402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f760101e660e961d37ad5929896bdf668d0fdaf15cd64652870f532ac46e6d. 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/JPJ902402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b4c511e6dd79cdf861e218d375bd6ea9dab7107a233dd6bd0c5552c6b2cc41. 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/JPJ902402060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83cce54e4d58fdd8e91f1ef3442ddb7070d8252eced97e59c50170937954b17. 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/JPJ902402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db2f0e864f90ae0d59306d14575bb89e0454bb26e8efa1b8c5c1212407a4704. 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/JPJ902402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820d4c1f9b29c691cc9b8bad4202cb6c1a05730c3c2f625a688c9c9ab7b9c70. 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/QZWFE2343204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc52cb58af04beb7ac9161f45eb1dedef429bd31ac8887238403cdc8fbfd098. 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/QZWFE2343205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3993f4be6606c2759db1ed7033032f9cecfeab2c7da6613036d62e8f02430e7b. 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/QZWFE2343206.
Everyday I Walk Around Like Crazy! Don't You?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528429ecb82d328cbcf537bc4fd6aa20ab5bd8cfd33fc6ec8fc5ce9e1034c6c3. 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/QZWFE2343207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e0655c3d7e7b6646463eae442021ccec63b12f032f6684bc6d80120e2d10d. 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/QZWFE2343208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dadde4a22576e67f55421c2d3c5059e2e429ed12b5d559343bbceb28cc39f60. 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/QZWFE2343209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fb06161bc1d850e0cc9a2cac0e546024ceebc4bf166392cafb16d1fb3153fc. 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/QZWFE2343210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d350cb1c9794b10f705f109aacc63b228c77e5412f23a9e7e966a1dab4b4357. 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/QZWFE2343211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70fdff15849ab03194edb9e126d88c6e7d8a14b17665100aea0ebd09a18a9f. 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/QZWFE2306155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb409ab21edb30809d3746eac5ac86e09e430c033cc168b43d641eed42c26cc0. 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/QZWFE2308042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec0dbbc5a52f1a291911d5806da0cd2c61a808cf2108e308f380053247f38a7. 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/JPU651502770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80001a83f7f3c37c75e190d8b1e79cc550ccbeeffe62fc642f8445d6c19e30f. 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/JPU651502790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f4f89e286e116da0c015718fc93ee09a439a17379c4f5c990de68e5df55a40. 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/JPU651502800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc444dfa6e5adb362ca0a475cba888b9ee2495d5bfd4e1025c47cd8e8393e91. 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/JPU651502830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa065929872cb6aeb99bcd473dadc24bfeff1f5077161069c0bc533d48eae21e. 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/JPU651502840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd455a5d1689bd14c73fd183a050295d72009720939bcf2ba03e50b046441801. 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/JPU651502850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b852cc7e43fe16f4639bcdf4877ac1240143650ccc4a039ea0a99d991c46917. 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/JPU651502860.
Towako's Diary (「大豆田とわ子と三人の元夫」オリジナル・サウンドトラック [and more])
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fb401e3c6c1ebdb71af3aadcdde817c75e48fb4e80e102f4f8c0e8aad5d424. 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/JPCO02119360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547a876bcdca9d0090e9f47c3fc3ddd04e1ff232fd75c65a9e0cb66161f2f831. 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/JPCO02119350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae003b5b00fe8ecd690cdba920c10eecfde517552a9295a67e4fb35237bd7867. 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/JPCO02119340.