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 0xfac256b8178e3b609d83187ff68f51167e78a7c1e5dbeac65975469897b4211d. 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/db17d2d4-c8a8-4cfa-91f9-d7bccca1e41c.json and https://artists.proofprofile.net/proofs/artist/db17d2d4-c8a8-4cfa-91f9-d7bccca1e41c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Natsuyo no Piano Medley ～Oyasumi Ghibli～
夏夜のピアノメドレー ～おやすみジブリ～
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 0xb9b35f4059773e898b001970735018f97ca8936573b744f8a5db48f4e39829df. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBPS84461870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f25cde7777200fc75a9c57780f95ffb3b79dd4b6939487613500fff462364. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBPS84461876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a59d30b19c6978f4a25927323b0e4e577841dd858115e0c218e6cbede56d2ff. 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/JPPC02510989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f67df71e90c51d07650ae334c0f8dd91b84a38f27539cb5c62d61fa660122. 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/JPPC02511003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669a9dd3d528df753f78ad27ce72322f25c5003e366653defddb6f92935789c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPPC02510990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6b96fc709160612aeee131c2ebb70c58dc5fea2f119e88c17bd6f28037ca3c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPPC02510991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1059287fb0c25c49fc7830e0da12df7e4061122005d5ad2268680a146582ad. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/JPPC02510992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c7f76c28a3eb8cf5b0fb57ee5353e54a62fbc8968ced515c80ab1d185651f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPPC02510994.
波音とピアノメドレー～くつろぎジブリ～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a59d30b19c6978f4a25927323b0e4e577841dd858115e0c218e6cbede56d2ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPPC02510989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f67df71e90c51d07650ae334c0f8dd91b84a38f27539cb5c62d61fa660122. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPPC02511003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669a9dd3d528df753f78ad27ce72322f25c5003e366653defddb6f92935789c. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/JPPC02510990.
いつも何度でも (千と千尋の神隠し)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6b96fc709160612aeee131c2ebb70c58dc5fea2f119e88c17bd6f28037ca3c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/JPPC02510991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1059287fb0c25c49fc7830e0da12df7e4061122005d5ad2268680a146582ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPPC02510992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc17b2cf668dbaaf5ad5a9f12fc268c678a7c5ef2e016fb8937c16fa116ae03. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/JPPC02510993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c7f76c28a3eb8cf5b0fb57ee5353e54a62fbc8968ced515c80ab1d185651f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPPC02510994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa455b2e3ca01015ee5dba7c0ac1d2b6e447ad7725631f009e5942e9ee2d4a2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/JPPC02510995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed8abc9438a58849cfaa10a8440c0dba21775b1049927fbc1ad5d079ae1e0d6. 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/JPPC02510996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b722cf00896bc347a0e5f00201e31ca07fd4e7872964a5f9450461149f1744f. 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/JPPC02510997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4384dbb2f060ee52de952f26316ef9efc058b975b2d4306def0b225225b5a12e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPPC02510985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b090f2eef061d08e6844197019be1e8a3a793c1b5db71e041a779e842ca04d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPPC02510988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860480f0c7b0cb8b4a8190a92f509b5b0ddb0187e5100e72024b4c7f3cd3572. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPPC02510998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330765892e34ba26dedcde77966f5a29aff19b23eda73b07b723eb46d1bfac1. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/JPPC02510999.
やさしさに包まれたなら (魔女の宅急便)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa511a63a0501bf9fc3937d0e4a84310e32c92dac83fa15c7690d2ea8d0bff59f. 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/JPPC02511002.