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 0xb9b6d67fc3d39a1a4152371d514a5ff3f72ed5c5f8391cd5ec0b44046d086f68. 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/588022d5-6f36-4d3c-9300-34ad9f2cfcf4.json and https://artists.proofprofile.net/proofs/artist/588022d5-6f36-4d3c-9300-34ad9f2cfcf4.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 0x0e31d65216cc531c830eba7c29ceed87adb25ea0dd34e134a16d1f69c276c50d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DGA052526594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23127335b33df235fbcd9137df1f475cb48f5d8c32cbc9864a656fbb0dd5ee27. 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/DGA0M2301127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1203514679d1c9f2f35fb409fe71eaec03a520bd17a7c6a031f1b09b76f99ff6. 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/FRX762377396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c634f570903dea724f164428fe5fc037a5ff497ae465f95f477842524bb321. 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/FRX762377397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994cc6ff60324f17f356bbbcec651ef25d0d45bf5ecd8016dfbfb35c6e40cb53. 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/FRX762377398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808f9a7bbb4a6c20c20dfcf98ed132641102439700c5b4ab83d60d22ccfc2f21. 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/FRX762377399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5f4dd6fa855f70a73cf79f496b3402912b0fc0880fb351c7ddad8f7865c1d. 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/FRX762365982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05072ac0adcdaab713a0d07054b7c9e278582f874f2af5d4164663690cd8e394. 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/FRX762377400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ccc8136e51e9e0adc59d54ab990742ede39efbee2cfbbf70628c878dee98a. 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/FRX762377401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8ee27d44e9743c4722a1359ba9a44daeeb296a89095cd5256276494a8bd2ed. 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/FRX762377402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9c10ea9e50712c210d334b44744c9890f39d21a436c77d6d3f7049b9487693. 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/FRX762377403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c9ef17c07e3d3fee6c3def24063ba47be2693feef8dd92a10baf36d35b0c74. 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/FRX762377404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5293f9ffb2605b9179fc7e7689d80cdeb8748890d06a87779d5f00f1cdd4f6e. 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/FR2X42333981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457fd5228e00960d7b7ba0cbccd50031bb2b5dd8ec224ef864ddd5138dcae03f. 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/FRX202201859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5f4dd6fa855f70a73cf79f496b3402912b0fc0880fb351c7ddad8f7865c1d. 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/FRX762365982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc86d164b3a3d09df243131b1976def31881f1f0fd6158b168f98e596ef7745. 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/FRX452110626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31acf6c54e5a281610364aaec00f1a6db8df4cd883632461115813af189197a. 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/FRX452110627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd07d1bdba0d7d14a8faaddc1a10a161bda5d70dc9b2b1a6b00c01e9659aa1a. 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/FRX282191062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0994b0f9b4ff4f89532d0af1b78ddde43459055ddc24d7dedab949243eecc0. 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/FRX452110628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8748bda998677ec37d53f635f76325126fa9dc3afb5a52e42b5ef65f1ee0882. 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/FRX452110629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5726ed45092538eb60d7de61547ccb3efee4629500e43cab3f0593a3107e2152. 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/FRX452110630.