"At Seventeen" is a song by American singer-songwriter Janis Ian from her seventh studio album Between the Lines. Columbia released it in July 1975 as the album's second single. Ian wrote the lyrics o
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 0xa49dfb7dd5d9ed8fe8a0f45748a2997b01d3e5500547ec9048bdd128039e0c24. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d6ab4ce-4395-45e6-893d-088bc8fc06f3.json and https://artists.proofprofile.net/proofs/artist/9d6ab4ce-4395-45e6-893d-088bc8fc06f3.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 0x3d8aa69580b7e6b5e58dddcc314fdc2120e7271194eeca555468be94e6aed22c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPJ902103040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484f30f40914bd5c760f05f5ba1bcd2ccc2a4ce1a0cd19e1fe63597eb72d2fe5. 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/JPJ901908380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b5984122d66fe1b80638f1c69a5e5f30de3c202f0d5ce9d2c30048124f84a0. 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/JPJ901908370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe654505ce73779a666feb5b275636918e3bb1848029a45faff7bc968b2f29e48. 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/JPJ901908360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e178ee5f88617bacde23fe6aa4583937adbca7410a39f472b844469ed56787. 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/JPJ901913680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ac7a8724eb97ffc72d0efa9bb68236682358013142ef47d55cd288d3168fe6. 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/JPJ901913690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5fd8a1cbd41104d2ecef1362a183c47e40dea89a12196f9b5701425da2c037. 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/JPJ902009370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa657f6caae80eafd0e18ea65b160918726a3770af53986c0dc9e0709c6c8d320. 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/JPJ902009770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7caeb81bc68e20d543465cf8b69e9a67a134094c27da121b3637ce467335898. 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/JPJ902009790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83007947958cd0b2ca67e246462ccff64432fedd36c5af7b7b8bae465ecfa88a. 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/JPJ902009780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729cac9615135073a3ad7bc7c29f59546ceac2d5f115ca8a5537eb8f0db14788. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPJ902103050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e662788b40fcac0203ccc7a5529953b7ec32fbab928e85b4595ef667f59bd. 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/JPJ902103060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cbe2d9f1700a8a0efca1adb0be8f3ec45bc281732042c20878adcd7fda2a17. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPJ902103070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609229691fc32a845f868c7933931db32b8715ac8ecc5f3c583cb88988937e01. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JP92L2307860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83007947958cd0b2ca67e246462ccff64432fedd36c5af7b7b8bae465ecfa88a. 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/JPJ902009780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5fd8a1cbd41104d2ecef1362a183c47e40dea89a12196f9b5701425da2c037. 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/JPJ902009370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e178ee5f88617bacde23fe6aa4583937adbca7410a39f472b844469ed56787. 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/JPJ901913680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ac7a8724eb97ffc72d0efa9bb68236682358013142ef47d55cd288d3168fe6. 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/JPJ901913690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe654505ce73779a666feb5b275636918e3bb1848029a45faff7bc968b2f29e48. 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/JPJ901908360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484f30f40914bd5c760f05f5ba1bcd2ccc2a4ce1a0cd19e1fe63597eb72d2fe5. 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/JPJ901908380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f695ce1c2ba76a0f019b9eec66bca4200e661e5c048eb0242a72b5e0b61fd9d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/JPJ901810690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e0b7a9e7c6f83bb663db3706a865ee4bd0f2ccc5c6fb74300ed7aa1106bdc0. 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/JPJ901810630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf711eff9eaf37843dd5c71f46577483e803c187c8931afd2e00f2f01f784066. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPJ901810650.
毎日がジェットコースター/ LOVE SONGは歌わない
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc8845a4737417dae456a77c9bff96f2675b338a758a69b048ec62e2bd4fa67. 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/JPJ901802740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db73bb9be0f954bd4a7a716792965179d6c199498fa175d25abc2ec04dc29ae. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPJ901802750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1781e5010bcb9463ec1ee1cccc0a8fd286330224377eb264ded784262f06871d. 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/JPI102200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4150cb1dd8cb395bffdc6e79bd1d55526e6482edb1769ecd5bd01b964d023356. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPI102200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fa1670ed621c87e20b3c781b62b356d38ae32b55415c098c5f1a3a4e0b4e9d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPI102200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ba1f800ed7b7f9aee5098c13c8015c52149c1d6330155f0e30740073fb9d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPI102200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a75ead49c6d01b0780f98ecc6bd800793c6781b71042010b90a58e062e364d0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPI102200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe057e9df12a3ada6940a36fe3a49581bc080af0401ca5c82a328440719f17e0e. 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/JPI102200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ea82797007d2656e09eb8b23690e56d921a4aae1ec3d2a79c07cd2aa1e3b8. 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/JPI102200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5ef5f02ab064b55d7b1cf2c731f0b15d58a121b971fa0a106cb115dfe7c781. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPI102200625.