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 0x252ded50459b1fe530d57dbac8c61a02a9a780f026705397427bc4733c7bc28b. 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/39d51e4f-eabe-42e5-b9de-a3ec8b7ec676.json and https://artists.proofprofile.net/proofs/artist/39d51e4f-eabe-42e5-b9de-a3ec8b7ec676.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 0x9491c6d2a04d9c83d771aaf44655ee3c7052969307b6f6771bef98be22d3edff. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4Q1825022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8383958d96a81008a99cff015e9c1a28345d645d5bedbdd6851485e26e7af5a8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USL4Q1825024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23440d0f8be069c9552c67dda19e5d2bc97eda30e8c8a300bb031218082b1d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USL4Q1825027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b83b62655c7e1d1e001c183842c9f90f409fdb0ea9f492b555d38106e11c0. 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/USL4Q1832274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2036508174359cd7c174cb865273f94a4df2f07bc642cd335737392b0a28f0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USL4Q1832276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89519e4c389701fc5f1c2c9c024af42b4cc46d38a375cab2bce684823f01217. 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/USL4Q1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14943f85e105b3fe513c1e4b69a39567a573da542363973b9782aa9d944aa751. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:46Z), 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/USL4Q1800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafd118cd74b0ea26c4ecd96ac27b041cf568d65565e266aed471a7579ff2268. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebea2d7742bcb7e0c1ccfe3fa8674199281f1b07d239b6ebdc5d6a30018b74f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USL4Q1801555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb08c816569fe0e901919ba6a95d2efeb4d13a77b8d7c0fb038aed5a1d3cd8b. 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/USL4Q1801556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c54484d5f4829b482ce1362a1b8992d6fdfc8b16879adbbe47070f13c84942c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:42Z), 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/USL4Q1801558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fe67293fd3caf96ec470fa8a5eb6e8f7f987630de35114162a228cc18df4ff. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:45Z), 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/USL4Q1801561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2253453cb51f1afd57a6ee4d831199fb7e83187531b6e796056eac636a9eaa. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USL4Q1801572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e0d83cdddf75cb021dac9ba40e5854f2d9581cd4c1a4663c0cea72af19478. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4Q1801578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dea40a23bb7286fc3a8fd5333d6eda55dfe84f765ca5286f0e1b0e38a42eee4. 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/USL4Q1801579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a1e34b34fd97c1c65f5a180f470e06ddffc48980638fb2b264829908c5d850. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USL4Q1801582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30580c51270ec1117f5bb7d4954564d7dd7c5eaaa790984a36fc55c6d6bb742f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USL4Q1801588.