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 0xcd97d9d11f986e5be0ed2d598f000261043b486be51247626f447bb2b557ffa0. 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/4e621a1c-10a9-4f30-a8a4-2314506eafea.json and https://artists.proofprofile.net/proofs/artist/4e621a1c-10a9-4f30-a8a4-2314506eafea.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 0x2349e86dbd7b265c2eb928df08020dfecd95c3cb6d9f10ed0e6e9c19a68ea5b9. 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/USJ3V0829963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4332cdad5bcf9fda12f9117bf374071d218ea19be729dd05a0f96cf3ddafad0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SEYOK0931103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e90e555d7a9ca739b583d3fc8c4864ca743c1ea0545bf5f291e189dde50e0e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:17Z), 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/SEYOK0931108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bb7a00d0dee4e162c88f0a4798d2ee012b6ebccf98ebb08f6a93fd1aa2e23b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:55Z), 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/SEYOK1011397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd199620d9ed4a6199fcc1a553597438f7652d708e08e8f3b6c1936faa8134d. 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/SEYOK1011398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb261036044e883a2e40295b0c089b6682204f59caca371a1b03b45546238a51d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEYOK1011403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346f0eeea19888c2a74ffcf35938a7a4c074558d6ee8fb8f15cb0ffa868b8aa. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SEYOK1224950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0b34d3657ac65148d53026fab273e7492bb48b3218ece99f9f98d6860b5383. 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/SEYOK1224953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c421a59279eb17b4f53db8921119b0e6b1ff37e926649b8af105d2dcd0d4d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEYOK1224955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb795826d3270536d1db295b067b0eda64f14153b958e6363223fdf03803a2679. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEYOK1317272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc231a3df421b46e43518ace3b02e1d49c8ee5439bcc5ec47624b8d750d98b8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEYOK1604846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea2f314445f6a022e823139f23170bc10e762d86d0f70ba3125c544a9bf7820. 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/SEYOK1604848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc14cde60d3c6e0f6b70a89cee4f25ad3cc695e2dd5f575ff936dad0415cfb3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:13:28Z), 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/SEYOK1618343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23dc319f4b0ad8c1e327bb3105aa71be20dcb6f9b230c48b3a34ef9d54610f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEYOK1668702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a08206d226f92539f786b13efa6652c0712ef4372a8c8b785309305baf77702. 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/SEYOK1668703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50321060749c261c6179cec86624d127ef432d5d19efc0060fb7d5ad30b90ee. 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/SEYOK1668706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387fced95c6835e83efddcaf41925fa49a21d00ffde81300bfdc97e05f6f8835. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEYOK1668711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf93a763c42ad568109a378f59bbef27e5c87b8d4a9cf7fc45f69dbad961701. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SEYOK1668716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6258f440b0b0626c03d1588f802981a9981cfb574cbf17aab9a3d36addf19ade. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEYOK1925163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73021417d8f433951861ae5a3f750eb69a47d32750467d99b9eb06c4661d5ebb. 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/SEYOK1723042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e263d802b39b67fb3c32f9b0bdba6dd31c764e3792fab7b2fd2df60e6b64fd1. 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/QZN882298306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ea9f4a0b955a2ebc556710dc2d84035a8a492998f9c01d60771fe04b21bd9f. 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/USJ3V0938795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeb574458bba867ae1298fc18b210ce50d84a1b8e541cefc28991e42a1fcf95. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEVGT1003423.
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