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 0x3c3ac5621542525f620bc01b5004c3cdf132482011c54e36484aa6fb64b2e342. 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/de09adbe-cd92-4101-b3d8-aa639c78bb71.json and https://artists.proofprofile.net/proofs/artist/de09adbe-cd92-4101-b3d8-aa639c78bb71.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 0xa2707e50c8f7b56dfb089cb659db928cd142644ed7d23e60c56b2ddb6eae7932. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BCVK92401809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bfec56188d34912125cb4159f64dfad37846fade5a604a4645c4d9dbbe7b4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCVK92401812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff40ff17b428722b65bb64fe01fffe524bc77bcba2245a9e1612de7b6bdaa0e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCVK92401813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841d5a80099cb1160a145db2a213db81b1189ee99a9de4b8b48568373f8a1e6b. 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/BCVK92401808.
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 0x6a7289ac187f4e055f3554182db927bbb48b75f1424120526837f1869371f7a1. 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/BCVK92401811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a898562712c4f07946695019604da3e228334cb7db6b9efe474d90b2eda5c91. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BCVK92401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72835722e46afb95efd2854a4e790a5fb62a15f9f8e6a7a673dc392ab76b3ac. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BCVK92401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac167dff362138791e12280c642ee7a5e2efefb2b177fd6352796b11ac92ac12. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BCVK92401815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf16f0e0156da4bd38f8c97685e0d7e1a08ee10cd807b8b7bb4b6f6e9c971bf4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCVK92500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9309e5313e9fe91674076bc8656c78c9fd99d95821d21b0aeba69bfd84aac. 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/BCINB2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef190019e096dc9ca34710ca857850128f04224f3356734061f2c002ce4904. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2565590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc947167353a886281b572991d77971fcbcd4d9c5299d2b4fbbe8b147d9cb2766. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCVK92500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe600c87b2075ef80762f364299f3c5df392869d7b206c516e7e3f2a59975e783. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCVK92500377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc50f1a514914d7c32da280025e0ff1be33378756c48b22b1c8afd111b6f999. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GXD7V2540160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998ce80a86252c2103b0b928907c05b5cc11cba3db35ef4fd21ade59f4c855d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCVK92500641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa031ab79feff8c41860c64cedd02fc4614c3b48d506d648e8c07c65cce9b859b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCVK92502362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c673aecb89afeb22f03585ec35cba347a71db2b53de11886fc35c8144dbb75. 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/BCVK92502297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7125819ad0493b43338830f8d68b817ce4d37246c9b71204e536daf40f506809. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCVK92502272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cc956f8a61a9ef8442ad45974355029f19145587b2f62e697269f6d966e712. 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/BCVK92502264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0d1b5615d579cd1f640c1d796d8496ede952793715ac11f04928ad9673ffae. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GXBAV2098961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6296fe5d16708d423b7adfda9dbc0da6629252002c56b988c503e48ed65e75. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCVK92502023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9b1ce8100799fff4121cb9423a4ed73ee6186e027a6b6f1d5d020d0d617a85. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCVK92501966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7d5567b286927c03dc652230b6c6a6804fdcd4a04df293321cefc0b51d5aac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCVK92501737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c5616923529b2f8ef9f25d5fb6a9d67cdb05e6bda015bdf127581548e61dfb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BCVK92501738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786a6c3375e5659281f98f45ba13f2eb026ad57942acb3a0162766a406536597. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/BCVK92501739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde6c9e9d54a5791ff02eecdfa0187bf653b54491d531e2f47f1da7e4f23d0f0. 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/BCVK92501799.