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 0xd3a2f2d0cf7cc43fef72c4908442d80a69fbeb48097bca2fd00807d435eeb2b5. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09cbf192-1b08-43e0-ad4f-b93d1764c9a8.json and https://artists.proofprofile.net/proofs/artist/09cbf192-1b08-43e0-ad4f-b93d1764c9a8.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 0xe1d8e6f9797bb2dae3faf9dd57a1053926a03301a2745f79d33228dc2b44ad37. 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/UKN492400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d377d9249b3ba09b23d0788b2dd09e92c55f2e578bb8635c9f8ffb34b1266e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/UKN492400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9532482c9081ac27b1ebf100b87491781a7306fdb79a83eb04e590e2c2dc2aba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKN492400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2237603eefe3c5c0e72464e8fe8f60bbd572a094c8116886fc5496d98967d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKN492400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9532482c9081ac27b1ebf100b87491781a7306fdb79a83eb04e590e2c2dc2aba. 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/UKN492400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d377d9249b3ba09b23d0788b2dd09e92c55f2e578bb8635c9f8ffb34b1266e. 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/UKN492400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d377d9249b3ba09b23d0788b2dd09e92c55f2e578bb8635c9f8ffb34b1266e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKN492400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf3b1d2319f21699c30a789609c6c9bd98d7faa13158a8da5defa5709a4512. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3Q92141074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23428f2464f21af7adb890d0be20bbdecde216638987289efa319a3f494bdb0. 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/UKXN21924027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dbe224058967cc3852655f6d22232935037adc4876b1036a9c10ffbd4809dc. 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/GBLFP2019220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b945001b306ccfbfbe98d64256c77be25280d9dcbd23c2f558845ae5a81a4a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBMA21996103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7edd2e6829c3f8e12eba7c3a5abdb810038bc958e953ef2c179e1501c1dc0e. 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/GBMA21904328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a774b5380f13638c0934500039f70b011042a67ffa0ac64f2f16a930f6035a1. 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/GBLFP1754198.