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 0x0b7fe3f6141635a2dc353ed73fd8dffcd187aa6b49bb3f07de749b68167fc68d. 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/0d11034e-f2dc-44b0-ac03-350c8a76190f.json and https://artists.proofprofile.net/proofs/artist/0d11034e-f2dc-44b0-ac03-350c8a76190f.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 0xe9401e074964ac6ffeb6763e78a6f1ba1df2c38919f739225917117fff34a422. 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/QZHZ52263516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f3d4fab2db04ce696c3d88e01c87e8ee9d56f7053b0cbb0043d27e56258fdc. 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/QZNJX2011358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a84babf4c8d707cab4d7191bacf29464242919aec246c27b67732026b2fb3e. 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/UYB142413103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c193522afe30837615ffd41f62d67101fb7b54cfa31e7ee5ac88825d1b8c7b. 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/UYB142413101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe005f45cc8327f936d1a5d34a17c8725e9d4f9e4724b8b166267b61a60bb3e33. 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/UYM122105510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3ae4cef6dd791b8bc573b803178ff77b4009a673a921e71dd8d079afa5e33. 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/UYM122105509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd4a35c1dfd3840213e7952915c112ba2d0ac396c19eac5a0aa7fc512d7e9a7. 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/UYM122104530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd674dc460a4a349b43dfae5e7caa7171572c31ad8d5f3169ae5e88bdfcee47. 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/QZNJW2150650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d1f821f4a95cf24f932d9c7f5d5ceeda624d747c0a54b1f35e852edfade1a. 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/QZNJV2102239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2a75596a9dfbedb9fa66ba4f1f4fe413fd4408d1ecaacef74279793ee25263. 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/QZNJX2004168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5280db5d94a90bfb0a991e8a1fbff7de17a3b8bf59c3bc76329a5f54b3b86. 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/UYM122002501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaccda8e819b2e3438ac40201210c121e3ed8a0e9b33d8196d42ac085fea7fb5. 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/UYM121902823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cb0e6fa83822fdfe542754849edab787f6ae969db0ea4d1a1c100f2c64be9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UYB142413105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357ad6814b7384ac1fdfccc7d3318c6ca172277b57fb010f2b1737e7af2ad0a2. 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/UYB142413102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e9040f2ba1864f525af66b327f4c5505c0dd468ecc3bddd5e73458e0245b1. 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/UYB142413106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a84babf4c8d707cab4d7191bacf29464242919aec246c27b67732026b2fb3e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UYB142413103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d77046442cef51f4a77f1b6c323e899cffc09f5c6e3bff711b4a61b28cc0b0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UYB142413108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c193522afe30837615ffd41f62d67101fb7b54cfa31e7ee5ac88825d1b8c7b. 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/UYB142413101.