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 0xb9b308e764ca2b5b3cb18c5a8870bc415653dc86f0f7d83afebeb76ba0ee7e5c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be773256-e026-4333-aef8-e14cb2c2f5d9.json and https://artists.proofprofile.net/proofs/artist/be773256-e026-4333-aef8-e14cb2c2f5d9.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 0x03d3e62b8c1dc1e7db8468ac0f91783dea8682b10789b0fcd6893eddc08c8b50. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZJG51961088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcc1d85ce632dabc513f9eb462d402e24ef71597f9eff864ddd41f5526d7c2a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZJG51961090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4429e290e9b8176973cb281615ec35be22c7746f37b462a8910ecdbb4cf175b9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZJG51961091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0ba379e1310246ef9609c3617b13e1a1b1dc5cf76a6ccc2e2d4e33eb0826f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:11:10Z), 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/QZJG51961092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d10bfd5db46ea6189a39be30121430640f6d20d4812c8ba05e6df1bd5827006. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZJG51961096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f7891d214e2d373354ad338ca6cade490914ad16de99ce1970a4ad28c0c3f. 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/TCAER2065227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea431232397b18500ebaad6279b3ff2274ed3361fa5888a6dec5f10acd934ee. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEV2068538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626693527148278d7ccdf35a69488cdf7d37d4e0d6bcf57bf764756e4bc0d0c. 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/QZMEV2068549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea431232397b18500ebaad6279b3ff2274ed3361fa5888a6dec5f10acd934ee. 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/QZMEV2068538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626693527148278d7ccdf35a69488cdf7d37d4e0d6bcf57bf764756e4bc0d0c. 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/QZMEV2068549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d378c90b6ce86bfe5dbf2d47fb8779e3d8e45be8ee9c03ad4deccdd0d74bf. 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/QZNN22100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da202cdd08b7af172f080b7d596f0d0960ce13f950210eaf60b83f038d05bb2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNN22100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aadd85d70a02dec3582e78a8d1df86c93cf5f4f72f0cee3288eb737c1fc94e. 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/ZZOPM2119783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3288c2cfd1ce021a943bbd86226d6efab6cc001a3a606aceb6ba761dc9830d2. 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/US39N2200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde781ad679bcdce5d3d484fc503388a0bd4771c76ad789679b3c39884542d512. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/US39N2300976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3288c2cfd1ce021a943bbd86226d6efab6cc001a3a606aceb6ba761dc9830d2. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/US39N2200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495601bcbd63285fd4c7e7ef91c24f7bfa9292bbf647d2ab012203a427ec482. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:11:10Z), 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/US39N2312114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d7e090e110c6fbe0908d68dee6310db54ef8ad6d59ea969ca7677ccc275c8f. 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/US39N2312115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd728431e6f8cc6e7c035ea4d0c2557efa637b49c8512012982b0762d2e7ac7ef. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US38Y2301410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af5be1799e00e6ffe825abd71c555c9e4f84f6d26abcc635855076e8a4b3dd7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USLD91775760.