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 0xbccafbf03aa1918e07f62bb87b2c0e5957cd843ef01cfaa20f652695af980ec9. 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/e6f93afa-9a75-493a-b5f5-f0fa25b92996.json and https://artists.proofprofile.net/proofs/artist/e6f93afa-9a75-493a-b5f5-f0fa25b92996.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 0x0cc656bd6f7854057177baff6f8e81b07ec10d7674b9bd21e44ae22a7db28f9e. 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/GX38U2382326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d771ecc36cf032da9c560bfca902dd0e687b26f56f7a6e4a45d0e9574ec5fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLHR22400576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38c9d51a2ddc22e458b670e55d288755bdb10a645add5c0a516acd25b7e3c2. 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/QZS642425328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc61d686253e0c2dc38c12621b03e1553bfd986474d8190c103e3009c820d53. 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/ES5052400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd184e3bbc532de2c1f9dbdd110a0977e4a72dc4e2edf2fc919d89bf77dcf2fb. 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/GX8KD2451207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb539d0a8a50ebdce9931f7a2abda7580de7ddb5401dfd229bfff4b7ede5fa09c. 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/GXBDT2397047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7575fc22b34407add3e24544f00610daa4b5d22111e5275b6c2fa741ecb0a6. 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/ESA012323271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e00f8421be6af6156d2829418f5836631601aba46a1c0d97f49172120b3e0d. 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/QZXLZ2387346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6bc14b64b460b09f84347455a6becfa49ddfffcc9d04c46292521f96bd490b. 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/GX8LE2306915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704e9d3a37e46d4fa7188caf1f7ad2a0d16aa2d403ec6de4a233521fcac0136d. 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/GX8LE2204171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9aa02abf56cda3f7a33dc9cdfe86b6d9711d35cae54a956dbd5ffd13490e55. 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/GX8LD2259682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f04cd3855eeb1a853b206350a7872f6178ab4d6e6f6340af2ff2582ee0aa4. 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/NLQ8D2201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b128760dd661136e9f3e9068db668374151e2d034aae5622222e79cbaa50d81. 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/GX8KD2207284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7689bb95cbd5ac0991f0c3eacc63135907c3f15574ace27a6bd07ea61df7f9ab. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/GX8KD2207306.
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 0x57b78d50d8f39a9631f026c26af834dab11e1ba4d898c82385e1e0d51c3e16b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX89G2238934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fae075ca81204c405276cdc7f2151a5cf89c50c08eefdeb7d55702fdfdd9f80. 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/GX5MY2237361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57b8a119dfa205cd76e8abc770d9b162620f094b420f4e3e2e2d8f77a02e193. 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/GX4R52221063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b7e1293ff82f51b912b4d6c4e47308d5d20628aa733c7ec0400e4ccb211e82. 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/NLQ8D2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1119966ac4d5a5cfdac2002b4a6704dea1e37b3c31230d37d7bc9389ea0e48. 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/ATEK02177182.