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 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 0xb3e3c5648409465332abbd71abe6678a330b2f26d49479d250700b3e2484a53a. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/894737f5-c37c-450b-9c40-bcf5eee7554c.json and https://artists.proofprofile.net/proofs/artist/894737f5-c37c-450b-9c40-bcf5eee7554c.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 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 0xe082ef90576bbdb775df1c82dcc8aac5bc4f300297116746ae25f05b13b292fd. 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/USYWT0700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92aa29f82c310a775b50fa21a17a72483419d41ddddfbbb058d27a349faf895. 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/USYWT0700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4e73f5c7ef5a8e0ec9ccaf775129e33925bc032ffe3b3b0d568eeb446b1245. 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/USYWT0700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca4c02bfdecdfc473d5a3de1c7a2dab4d3402271402c61bff0ec2fed4460228. 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/USYWT0700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a6b0b3aed5e197a4fa8614a9c0cae8c951ac203b82d658d19b98a197465b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USYWT0700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd036cb3164413defabce25fad06b261f5a04e1a0d95cc5116ac2565b2cb874. 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/USYWT0700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe084aaa762d7ef3fe10bc2cd12642af88abfa825689d6bc0fc10e2fd6c2554e3. 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/USYWT0700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e152ad8188942b1b9bd0e08c78f518abb57b72fdda0fd4b7ff9c94ff086a33. 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/USYWT0700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb8bace4ac07d8a546d64eef17ada3584d7d7cf87db4d6efc9592bd5cd92ab1. 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/USYWT0700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695671c530a75113c9c6d83ca396fcb53fd66f4f0991ae6d2cb0f89192ef79c4. 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/USYWT0700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3820fe029f3837548e138ea323f01276465cbf070865e0b9658a8efa0671a0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USYWT0700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d20380060a1ae937e5a64d2d4cf4532531131edb6e66dbc7d699fe5376a3fb6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USYWT0700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e7f15ee0077b5b2bb1a1b5e8c5885862c0ca11ffdf1995aa7ea59758f065ea. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USYWT0700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e286d5b0178d57e00d69cc251b53d3012288e67a9946ff1ad33b6c9a5a535a. 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/USYWT0700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd0f0afb895aa6ac9482b60907d118838eb0b9cf3e0cd5f93eee270ab8da9e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USYWT0700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c7ce1b98cb4890c533524f109e307a0b4a016d9046ed3971a4d1840d980322. 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/USYWT0700125.
Uncle Muscles Presents: Casey and His Brother