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 0xb74a0d03ae64502ad49d57e4ba7dae7ca635d752d30a9f5c28faab689135d75c. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13013185-a551-4693-8257-b7eb88a39624.json and https://artists.proofprofile.net/proofs/artist/13013185-a551-4693-8257-b7eb88a39624.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 0x17c6f301c99dfe2ccedf679a172174bdf3d17ec1cceeb94f2f1ca8bfb1ba2a69. 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/TCAJL2558399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9193773c53dd83c4063ad94ccb51877d1e494f6cca9f16ef708b2718b68ce140. 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/TCAJL2558410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e2a16766fe651546430e579f5c48a67ff170a1dbb8e7edd6761e0ebd3a23c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T09:59:59Z), 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/TCAJL2558414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a22e613fb1b238d150b59673a536a28e6e601db31e3f090eae869a5f1675e2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJL2558425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239204057af6d0c1eeb8a37fc89aebf75f327e00efa8d99baef3558e54193644. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:03:59Z), 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/TCAJL2558430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ca7a180c17ae512065819c17468924dfdfe98f7958767a885ed9209d002b63. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJL2558432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a6a5f6f42ece55414cad97c5b188ab4ee6b1cd3e175bd21bc7930bf3d6ae1b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:57:59Z), 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/TCAJL2558437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c92963cf057e8fbb6b1f18bb7d92fc17a41bc7ccba19cf29d47fe40737f9783. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJL2558443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9529589f1093d23e106d141b4fc15a13fc6509276c5ab63bb4aeef9cd4434d8b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:15Z), 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/TCAJL2558451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803164211995cc73849f05957f1ef86fb7e5fbd4fd39bf2155522ca4989390db. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJL2558456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887114a8a8779b041e6100a22b32091ed13fbe4f8b2b9bc0af00fdabe45eeb2e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:16:57Z), 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/TCAJL2558467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59fa1656d37cb7ba32c1a3777ff8fc837d1f60fdc6504aa03030dc4fa98be04. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJL2558473.