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 0xd8dfa03ba569f544aa3c2aaffaffaa7c14b99cfc95ab7dd1dce6d30bef8b3dc7. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5c6a87b-5ea9-4b99-9b4d-f6505da51a8c.json and https://artists.proofprofile.net/proofs/artist/c5c6a87b-5ea9-4b99-9b4d-f6505da51a8c.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 0x06c2001a5b8be010f392495150b8599f459cfdda26aac780933478609cf8745e. 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/SE6TI2174768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d4fea8a44e09b72ee55a82b0db51d93f580980a88e3bab116c8b426448e2ff. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:32Z), 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/SE6TI2174760.
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 0x826c9579383bde88703bf6cbb16aa32a3d3d604d904d6dea505840c01108beb6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6TI2174759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f20e77abb66165ba5caf9940d377d2fede0d97961407e0fd9375754d8f9e8bf. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/SE6TI2174761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc931b028b32f3025c255c1f1c932d426e3d505fb70c18f2c6c2f8c6cbfae25b9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE6TI2174762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2421c7dfe15ed464419a9c4fba6642e73d28c2d0c806d9a816fe480a4887f8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6TI2174764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4545866b10fc890097654e4ced109fd8dea5e5161f6b9acb33c075c783e5fd. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SE6TI2174765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b5f1d1723ae569c482c97292e9a287c0d4914682caf1c63824aae7b4ca8c6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE6TI2174766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e1e3a35d5addb3110bfa26eec756286f368154303dabf0b07957ba7d6094bd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE6TI2174767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0066e1848909a7014247b1969b66bd92fb81530aa5774e1883f687d8d3fe1c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE6TI2174769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5fc78ef0460af5e60016371e42556fea7f49fc7c5366937beee27d8a7b9631. 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/DKQW91500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69876425b740a220a2f5aad467acf1f4e6e81dfb4bc80940c86d2ee7ca06bf34. 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/DKQW91500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757ddd455d466005c20a8c8092b65e94ecea2d9b70543c85d3c175d551df6525. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKQW91500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835654f3f8c0e29aec3c8546ed061bd160af822d16ab72044f46073a2a8950b4. 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/DKQW91500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae11954ccd4dd65858c21c072c42c6fd02b6c360231fc28020b00b5971f8ca21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKQW91500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65bb3c0fecbe9f0ef8595be1b28fb696d8a9ef5503a48fdcca5dbe0b6d90a2. 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/DKQW91500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3089daed55ca96baf4d9292a713ff13d6ed1e4896d841dfeb3845e7292e5e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DKQW91500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51e32ef2f217469e58e284db17b5af9e412561f987e7dc5aa45ee4f9bdaac9. 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/DKQW91500407.