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 0x922f1fdfb25ae0723caf8fbc6a910ab6b399fd5eca0aed06e5d2dd6369bb679b. 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/6c3250d9-85f2-466b-abc3-370c1f16adef.json and https://artists.proofprofile.net/proofs/artist/6c3250d9-85f2-466b-abc3-370c1f16adef.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 0xed6854054863d78984f4de49740ecb00e7060c7bb78044a4af983b6dd820bc56. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/JPZ920906982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9b5a7e1d8cbea25e738f1871f6e9e664d33e186f64d6a3eddf14629027fa8a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/JPZ921406846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd429a61a04c58d2fe2701d179a789c6e6f3fcbe112c52c0450793588711ea6fc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPZ921406854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9fbfaaf7bae769699e67fdc0a1d44c7aa29ec75b1a278d3fcca59098c6b1e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPZ921406851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc1cec4eb1d0329d24c86a7e908c8e9fe67dadcaa068110467ffd575d9accca. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPZ921514468.
Be My Girl Friend [feat. BIG BEAR] - AKIO BEATS REMIX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460ea326e671e23f38442c87cebdf12b1ab8400150348133141864818bd0503. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/JPZ921514478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74176c64617f98b93744163953e3b5ab14b014b5e383948f5911f83126fa6fc4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPF1746874.
荒野のバッファローソルジャーズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610e2fab07945a089b92aaa3da0b633b1e3255b45ee4be4f849ecc6fd0bc957. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCJPF1747128.
Shinsetsu Manji Ninpocho Fukuryuen Ichinomaki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef26222a6a71eb5e2c338730e3a55fe08bd9835612b5d74cfaf5a839f61b92. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPF1747132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f214cf5c30cc0fe7d684b452fea47d86845b289347fdf445fb9e00fc17d06fa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPF1747133.
Shinsetsu Manji Nipocho Fukuryuen Ninomaki Chi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d0b723f102ff7dce5385c8250273d20a6c9944fbf2f9c16dbde5c79539484e. 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/TCJPF1747323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11417ac53bac9b2234fed2e33b959d02f2b571d10ecf743a191940dbbfd9f5e4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCJPF1747389.
Shinsetsu Manji Ninpocho Fukuryuen Sannomaki Jin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a584ba33334568eb9f74207247433c9a0d398b2190a49c0fa15a42c63559497. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPF1748196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727aceb14954f1262b0568df43882b92de191b481a4249285829427e74eef898. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCJPF1748197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea6cc381eba03028e9d7174eeb6246102671d418e842a46247eddb3b657ca7c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPF1748209.
ずっとスパイシーチョコレート！～BEST OF 渋谷 RAGGA SWEET COLLECTION
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f90318da5bd64b8198e89ec2e87ecea1b1b5f1a59852e02a3df4375d2a83737. 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/JPPO01147839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd956bb7baba9dc4f1ca1e1410caa203d396a6760218d30431d23703ba0152e79. 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/JPPO01158179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5630e3e513ba1347d25cff158ece8ec2e114a38bd12ef2c01096831fbbc1d24. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPJ901615810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f90318da5bd64b8198e89ec2e87ecea1b1b5f1a59852e02a3df4375d2a83737. 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/JPPO01147839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1dcda74b60527355dc20c48f060432722104b15c2f600fbc5f84c8d940d65e. 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/JPY201405132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc93798a8a9916add67e10eb1826b715b6a696ebacbfdf7f84ca1326bde27f6. 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/JPY201405511.