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 0x8bff34d09a3bc94be96eed678aa3e6cc0757590d6f28f96910039beb5bdc5f33. 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/f0eff3b1-6a20-4261-83f2-949924cb13f0.json and https://artists.proofprofile.net/proofs/artist/f0eff3b1-6a20-4261-83f2-949924cb13f0.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 0x96ea174020f50ab3ca09590d596e4ebded34a30d48165bf5e35f7cf38d909f03. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:55:55Z), 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/ITS781700064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8003b6757c85daac5886be42aab16f816c7560757439768a22ec20384169b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITS781700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd2d5d692344424d21f72788cbf0030f68f98fd4d874d8665d6415d1d653fd7. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ITS781700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b30cd0ce1caf83b6471f795983d251f02345f3d512aea7ab9cefbc8a8b800e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ITS781901257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0910d3c3e0fd055adf0cf589cd5366006350246b710b2f095e0b813e8e8e7ca9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ITS781901258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b7d1b152857767193b148fdfe65ec7e8de94ab300fe7a637a86d8297b433d8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITS781800704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024a7600b34f8a1a69bec634f1ce6f09ed8b80b9a0187195e2c466f4577715ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITS782400579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975a1254d2858c1ae1858cc95ac6bab8b55a0945dfd264f2f5ec13bfc474a75a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ITS782400688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7d169c3bdc25f25d3078372432e30270a84d123a9d93bf423f54d417bcf113. 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/ITS782401274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7699f138825f36f803550b6cf3e18c7a14f9616670a3a083e6c526a9ff33f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:27Z), 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/ITS782401460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72306e4d99ac304075ba796d04b07559c9b2d42ec2b81b07ec7d4925ba4efa01. 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/ITS782401733.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c03aa8d4e1d5092db53673a440546c69163d03523371922c1924c7d3664d1. 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/ITS781601485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5868688adfa6eb0d3e012f4cbc17f930ef9861292b2bac8709a8efc124e66. 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/ITS781901148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bdc88536750f8ae5bfd3b38990f70043a9df0c40006cb97200fd8727c48cfb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITS782100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009bb84914f464081283872234b6a125e32d38b31f99eb5005b0ff5595a987d9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITS781800816.
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 0xf22bbd3c899367c13a3ed021b755065f9c1219f47ad65ba1ba0aa27854bc92ef. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ITS781601472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163e39685e8d536e3ad0559954a80521d287fcca7924235ed3da67927adb3dff. 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/ITS781601482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab6c27a02831acf595fcb64590b2babcb5ffe3579f2a6377d3d24a4357d318c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITS781601495.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e45bc19f333ab0d277f5d83e3df692922c35dc706a1e287441209989f8b838. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITS781700330.