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 0x9c01660bbe5fa7a01adbae1c4657bf9a18351bb259d4009ac1144b5d9a5d9079. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89554a3e-2718-4e03-b800-8dd0151c3f9b.json and https://artists.proofprofile.net/proofs/artist/89554a3e-2718-4e03-b800-8dd0151c3f9b.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 0x8ef615b48b36844bad031ccf017a3f381eb48d2c70128758359abf49aa137a73. 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/DKEPA2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492c8dce4595a4753b8fce4f326211eff363ca0ae9ca73709a7cca471433d1cd. 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/DKEPA2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85564040d0376c3e28621585a9c71a10f461b1320f0c0dcd92a734aba5909174. 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/DKEPA2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd235f0f1224c4dc9547163666fa035fbec44180af9fe0eea5cca74956040c5f0. 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/DKEPA2100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7d88c842ee84de2de51213292b6fc6b577ecb96c8f261701a883d896b6b52. 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/DKEPA2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09bf8d82d367b5e3ba53d28dc260be0507ca71dd0bf879502e439eb8b8fa6d. 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/DKEPA2100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc808045c793a2dea46ee3d97467e2f5840a91be5ef49fd43c924ff252b692. 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/DKEPA2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5af87de7279d4fcf2a5c82cc3215d46f271120a6fdde6acc37f2fcece5e64ca. 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/DKEPA2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62155061cad4e1349775c9aab11fba6e69a8f525db95c4b29f2317c5323cae0e. 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/DKEPA2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11010ee8c53a6ace07bc937763de09faef343c535c0a4b64ed82906a63886b47. 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/DKEPA2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeb17f243d2313f29aa354650591c0c82abb0ae38874063c0bd25433c7817f5. 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/DKEPA2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b24245b0d054800ee08bad8e17efd08bd63193a2956c6c0ba2f355c69ffa247. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKEPA2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0026fab39d7ab62c268bd6948a62ba59352cc18c5042df4886bad367c2299b3. 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/DKEPA2100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bd3f380b710352dc3ccfc28a22171bba6086c5c11ac22cfe75e7a4886ee4e6. 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/DKEPA2100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc7f6a5e0c5d63d108661f03f215f75128896dd3c87e8bda5acaa7fe2bb999. 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/DKEPA2100115.