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 0xb5821303e4ad8981d04a16cb59047641cf30730163ce562879600edcaaafc116. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed57892f-c6ea-4d8f-bd20-04abb954ddcb.json and https://artists.proofprofile.net/proofs/artist/ed57892f-c6ea-4d8f-bd20-04abb954ddcb.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 0xf79849cc0d4a1fdcb8107d528c346c8b1a7ac09772c7f0874d0454197eaedbe6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:37:58Z), 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/CH6542271435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103443bbc42aad1a0add0387105b0f742a252d1823a989132fe225c269542d8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:16:42Z), 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/CH6542271440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe761c3ac1f4addba94e175e3e053f1aa2fbba8699cd97423339c282868e17dc8. 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/CH6542271437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426d6e3147f09d05ec1983f243aea59cd5e64617ab7f93694a492abca233c88. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542274496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603f22975f89304be55fa552e19c8f4ebb28b416da5e6dcdac9713ebaa1afd65. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6542274497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cdc846b41e82f76801869ce7d4b5ead5bc7f6f4d0f299821ed1f7a4eb90849. 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/CH6542276468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30cfa6e4f49785534c4a2910c947c97da63d23231ac74c3c19e6db8a6de5a32. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6542276469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b2c4d1c57c10058a26de21ab83ca3ac5054145224bcc5fc9f6647561f2d6a. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CH6542276473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f9ac05753e28cc8e48faa051f3f6586f24f3eabc113e3e04098061fd10a6a0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:34Z), 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/CH6542280528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b5dafc92dfe72de1cf9417a265d461474dd709fb1d92af6fae1342b008d334. 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/CH6542277869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3020535855fd5a234646371d59282b441a0ee7a17e0ad6c633d235c8034e83c0. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:40:16Z), 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/CH6542277873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b01f8bd01de8af3624d48ef8754929a085bd33c0daa905e7a31386e3da617b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:23:23Z), 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/CH6542277864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c97131ce48695fadc96e55b2b9ea84529746b6d8b4eb60b47357dcdcba267ff. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/CH6542277866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7541853885baf264bc053b5eb44618029836e64e2d96237c827efa7236af7bc. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBMA22315858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bf18e614ebd0fd5b86002608f483b690beaa403dec17839a2073dbe2c6b4d5. 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/GX3Q92382963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d2133b1d5f501455c137e15be284a4f3ed966c0f8c49bf9d2cd297e4fb6a4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBMA22315859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c59bb95a3a28bc82111816804fe4fa51f26ab89f80d46e069a2725179ed05a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:34Z), 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/GBMA22315860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b78e8fa40f89c2d9b36c5d378435dd7285506e729df35216fbb4d9d6f6e6fd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:40Z), 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/GBMA22315865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e293e72761b7d44b9a5eea0d80fad360e397322e424124c7f10a90f9362c7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:10Z), 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/GBMA22315867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c6f7e6431fde0eadf1e043c106a5de9ad3e8106fd051a4a56ed6cf4adfa3a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:03:15Z), 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/CH6542570418.