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 0x8d0ba105f2693b2fa6575ffa2a801d5d195bcb944b5de7b9ed8c1143284aa07d. 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/a4b1ba8b-38d7-4e6f-97f9-4e01327bca70.json and https://artists.proofprofile.net/proofs/artist/a4b1ba8b-38d7-4e6f-97f9-4e01327bca70.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 0x3ef44cc7bf8d0d17b4040bbdfaaaa402b8dcb1566d6d734de73a8ed4dd4a28b1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPT552000857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9ca0f7e0eb51f829b85de6ae592bd79dc5b7bcbe2a0b13837a8240aeed49c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPT552100870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ae5cefd56a8a42bd438369bd7cc82517fc41a18ff9f9338199ad33a6ec9d1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPT552100848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe289661da958ce01e1970221c68c5e3cd71fc3d7048ea3e7a440d8cf0e920196. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/JPT552100868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b18971c4fe6c30e77c99b8e570fec04ef2cc2cc9f14a1d82646d252d559ab4. 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/JPT552100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702504b3a191f86517d5c1a8268d0970163ff9e2c8bcc8db368dd428e8798c70. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPT552100853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6fa30a67f00e8b04fc0d13c3068605be68e65f65eb592bc51545adafc8b0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPT552100849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f9077e95f69c82dfeb6aac3e66fb14bd6e74635ab61a39591ed695882e72af. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/JPT552100855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ae5cefd56a8a42bd438369bd7cc82517fc41a18ff9f9338199ad33a6ec9d1. 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/JPT552100848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16226c0d310b1b8b3490de7115d7666e1c9ea499f67bd4a06b797d09880fdf7f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/JPT552200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4a5c7754391b92cd873434cc657a182a3f9173ecd4c63d231660cd709f7f83. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPT552200868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6c0bc386531153785eee82df106ae40d0da597b37f549e1514240ad7336ed. 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/JPT552200866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09c9ea873a4d19ff4c365d00c25eb46007138936dcb9953e247cdb81514264b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPT552200870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a8a403a845ce603d1225ea38818fc07321b9eef2ae9a359f7e4e966f96d04e. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPT552200872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384f32db84f4bce12ff4b16c13accd826280b989f8dd4a8185adc930f0277a80. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/JPT552300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bc619fefc9e7e6b314d7d794d07a1295beea82b5bd0952436e9e4e5850f06c. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPT552300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cf4e714fa90645cb5579ab59353aa2e0b8687816107d27e4ae8b58b8c4407. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPT552300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffa6dae6d5a2ddcc2bd28e0ba1cebc1d1fc5e8523cfcd22d73053681fc954ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPT552300654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d817aba960cb949ba58505a56b2b7226198da744828c6ef47f64d7ccfb684e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPT552300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fffe5566f611e167590b1beacab0d86e77bbfb757564ee595a12a14a912cdf. Chain 2 (Bitcoin): anchored in block 957822 (2026-07-13T08:02:12Z), 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/JPT552400451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ffbb8a3e3c3faf719b64284dc181824ef36484552f1447fd15b2739b6577f0. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/JPT552400648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d554ae3466721b8920e080f8b43d2a94e15739f2e825978828852475df4e0e3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPT552500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2073dc81f4b0dedcd300fc796a771084d1d15d30e7fafdb10a57eb578094c7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPT552500083.
[Re:collection] HIT SONG cover series feat.voice actors 2 ~00's-10's EDITION~
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a77aaeb08938b15b8c8925095b0c841486ac4890b8d98839f18e242837efc2a. 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/JPT552400397.