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 0xf3dbd2a15ea7c9d8c928c7476798dc4ec5263a9e13c2e0985f5cc1599d4ac0ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1005abf0-133a-4529-8616-b087da9fb370.json and https://artists.proofprofile.net/proofs/artist/1005abf0-133a-4529-8616-b087da9fb370.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 0xc28588290d8571ce7c04ab56bc853c4287ac284457b334ab4bdb2a6e24b612f5. 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/ZZOPM2225349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0221ee0dc95c5bb15fc2679b8b13ad4d021f1830ea74acc1686bdff512c2851. 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/QZES92066270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcc6388e425fdf9c6559e5831dbcaadf0d20d223a3dd89d2f878f50f5244a76. 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/QZK6L2069391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c9927d46d41342dc12f582f04b9213bb93c624834a443354684cb6a7d2bb67. 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/QMFME2171620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180accbf4225ce03babf99358b7535ce96161c2f623220824085ce2c67a7314. 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/QZGLS2212636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dfe8ad9b84870411e1f18c1cdcb37896cb78b8428c6c6d4fd40b39de25ca4c. 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/ES71G2147475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097f6c92000c356210db7f454adef76deafee922570bcd19a151499e1017dccf. 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/ES5152300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097f6c92000c356210db7f454adef76deafee922570bcd19a151499e1017dccf. 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/ES5152300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b01636f4a97130b4c485be394bf34617e70075bf5cccbaa7cd56bbd487f3b44. 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/TCAGN2281031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc90a61e25b2b2d374b9f54ce2ca48aa9a9f33b31db2db2efe6a98951c0e9e. 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/BK4DA2401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a98e21abf20016ed9a249d0f6ded79e7241285688e1bbcc5e636ebaf1d61dc. 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/QZHZ32052790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ecdc2fdbf26415a24e70438989c0bc2ea0e3c4a4d4d7a9b81c1aa481c8f66. 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/ES34E2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33db7dd2a6c0781c4422441792e7c63ce3f5739ac6a4d8dfaac04a7cdec4ade3. 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/ES34E2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05044e16fe7725288c2c057e3e723ae95bd2e1f73949adfeb777365d51f0ab0e. 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/QZNJW2034304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d3e66fe9c3d5e0bec90bac579068be49694f6501922175a57864c5976c463. 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/ES34E2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f558982e10cb43f3514be391de88e97acde76453d22b5b7508ead9c977f31d. 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/ES71G2414477.