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 0x3345ccaa97a5a37a2fd28ba817df417a385036619e809455034c8560e156cd59. 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/7f98227b-a97c-4626-9dc1-702436341100.json and https://artists.proofprofile.net/proofs/artist/7f98227b-a97c-4626-9dc1-702436341100.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 0x0314d9b08ab2521a0a010d506e06943bd7c1e132c8a37b045b7762c76d798059. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA2P2043969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298ba794ad9283e46af96e6195bdce09dc9b454c27bf5d898a264a19c6b1a1a. 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/USA2P2043966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1869834f9dd8e473ee1eeac764039b682c8d432bbf1655750ec7c253d65a9a56. 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/CA5KR1934696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e6b30e0e0d64be3c67f25097c6e39c48a11d6f0902b509ce9a9c7be751982. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADQ1809658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6cc6223ac9e15dcecd1d3db50a8d8674242284ddb74682a5c4b3859c7b25f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADQ1809662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1b14482f04a19e7a31e38d57416a7ba4c2f81d8eba334084a8b65c1c8531f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADQ1809670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39957876127699dc6a72e17b6cc6213107bcb38dd8791ad0880eca670be1dba9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADQ1809673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e6b30e0e0d64be3c67f25097c6e39c48a11d6f0902b509ce9a9c7be751982. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCADQ1809658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a68a88cd19c48dcf01161151a47dfbe0ac89fe95b82e90761d021933a7ac8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX872030817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c33f448e2759a9a8daf5fa8447d8a16e381818c53d2cd908c5e4fddac01ffb. 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/USCCW1611161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e5fd0bb5ba8bdc38a0083ccf8f1c3b0125b84eedaa4ce9dc79f9d24a66d69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCCW1611162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bcb9c41caddd172f0bbfa1b5e4325a661334262312ef5ab412c8e05f1bce7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCCW1611163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d3212fb2284b69b43b8f5edb1b4e017b9ffbee6d90f24de2467431cfc7e97f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USCCW1611164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d341572db987f0c49794a58f85bd2d9cb400d7438a2b38937dd2cbdc086701. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCCW1611165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2103968fb8beb6ac845db227a14f652cc6624c34b199c8fc38d12a0b9e5ae755. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCCW1611166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c62cef817be6c27fd76cdc52301f0f8023fda06e019fb42e39a613f93d59d5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCCW1611167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c859a3f885d27d458226ad7a870d906ae22f237ea4754991d98848b34b0daa. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USCCW1611168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fd935248b5e5a27370b384bf65ca600fac521f7958204ec4ad54faf50102ac. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCCW1611169.