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 0x27ab7a3f8c1b94a882326fffc30b8ee99054fdca2d8c6be411081128869f1d3d. 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/8aa6fc43-a411-49f5-b257-13232b14ded8.json and https://artists.proofprofile.net/proofs/artist/8aa6fc43-a411-49f5-b257-13232b14ded8.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 0x773da621b081ecccad7d87abd1f4ff5dfea45d00445f8f5e5e48aea848157390. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ITQLN2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec48b94368d2e229502b617b23b7e6b8978c65c8373c06e28f8aafc58eaf989c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:11:24Z), 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/ITQLN2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeefb710514a7f377e401449166eca321428c1acb7bab179a0b402c66d762e5a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ITQLN2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec51e8b93c3c6a7a56ed17edb6d92e4077f4336e62fc6fba099ccc02baf154. 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/ITQLN2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bbd078b9ca1de4f55d755ac9c9cca358b6c9e26c3456d9712ae529f5ae7545. 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/ITQLN2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a1150da478cdc421aea1feac50fab12907b6c08dd7f26add92cb03fb0d9641. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITQLN2300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e659db2cc042e25d1a53d9a747daf1c25fc0abc7ebbe3dafc8f570b9c239b1e. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:33:16Z), 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/ITQLN2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b41ede367cf9ee274081709a2e3e956b5ce09d4ae96925565e0002a380b76. 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/ITQLN2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15ee60efaf670205f4e73bffe762c3a2a3f278d0b9ca96dba05b29e5f1b9641. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITQLN2300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773da621b081ecccad7d87abd1f4ff5dfea45d00445f8f5e5e48aea848157390. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITQLN2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec51e8b93c3c6a7a56ed17edb6d92e4077f4336e62fc6fba099ccc02baf154. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITQLN2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a1150da478cdc421aea1feac50fab12907b6c08dd7f26add92cb03fb0d9641. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITQLN2300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e659db2cc042e25d1a53d9a747daf1c25fc0abc7ebbe3dafc8f570b9c239b1e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITQLN2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9e9ac5f44373a97aa1fe056afe343c564a3ae811211706cfd2d0d213912a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITQLN2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bbd078b9ca1de4f55d755ac9c9cca358b6c9e26c3456d9712ae529f5ae7545. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITQLN2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276219cfb0b9c2452fa7bed803ebb570ddcfb402449e6cd736e00aba4096c2b8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:58:32Z), 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/ITQLN2300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf0ac60ec697fc3ffa3e19c17a2d33773289ac2977903a59ecd0ed0c7021b3a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ITQLN2400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd420db7989bdd77be7612b82cabfbd83517987364f9fe592e8c4ffd77f9583d5. 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/ITQLN2400150.