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 0x5b61ccf91459c7df93842cba153bdf31f7f5b8bc205106de6a0fcf4a58190bf9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7ee822e-06de-4706-99c9-70d8f3f652cc.json and https://artists.proofprofile.net/proofs/artist/d7ee822e-06de-4706-99c9-70d8f3f652cc.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 0xfe056e31b5225abdad80162ad150e0b385551064e4f44dff13f5c540bb3cf8f1. 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/QZYD92404360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747400c663432323c2c7f1d6958fb422e1f6da1544f43ac1a811c395410f0b44. 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/QZYD92404756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ae2a1535b5538e2c3ab0ae7d83652afd9c89faffe4a74175d58de3326fea6a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZYD92405093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ac312e4b4cb1e860a0350ecf01467c939fb9a5501c01550ecee0858c6e1dea. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:05:09Z), 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/QZYD92405391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b3353ff9adc99e94794d9d6683166981327f697b436ecfc681cd3d9a376b5d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZYD92405611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d4b4effc6c9b9b8ef89cc2f7630c63ff030583aec9f79d9ea8ec9ee6f63c4f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZYD92405608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39491c56c7a8483b49fee918154acbb8266dcce98a9b83dfd0ae6496ca94b1dc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZYD92506094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d9cc40434a63a4ff2b771c435c27fa96445fc5cc5afbe5c182a0d23ca42a3c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZYD92506255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec05534950f11e0da0485e953ab5dc5a95c4a74feba4cffdca3c02dee4841c9. 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/QZYD92506415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b7eb46f3a58a56a9cdd573905cf5c9b4d95e2ce341189d2dc1ee41a3f65259. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZYD92507938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b5220dc5926653233a87f9793cb577938677a5e62f753736a4a6e076c3a091. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZYD92509186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df6ffa8d34367b10ff96948ec70dd697833d5b144e2a2b9658388a0d6fbfdb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:33Z), 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/QZYD92509287.
Takopi’s Original Sin (Cover Collection)
Demon Slayer Infinity Castle Movie Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7134093f5b9bdc3ca66086135d3f120002726615bd3503503a7fea5238dc4d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZYD92501880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e599ffbeaecd32d0e1d550dcb1cb46d9067f3c7986a366aafa627d9e3ee6cf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZYD92502945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237ade2f77b7a718b21cf036a7952a2312eea1bc368b60e762a7976c054c851. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZYD92505551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceb14535472fafde9b6e05d4e8f00403ab40aac5d88e89882cd099ea9383260. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZYD92505134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fc81a8cf7d0cd66dcb50096718440beef3505ac4e635e3821a5809542901df. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:12Z), 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/QZYD92503432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fdbb479ab32825410ee21301173a3c4d01b9c4f8b149445bb60c2dbe64c5d0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZYD92501435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17656f0bd0ea119864026cdb51fb3e7a304608e9fcfa1d6a62b8e0c70582e25d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZYD92501308.