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 0x6da329cabfe9489b30649333d3683b91e193f08e3c682cf7abf654a30c78008e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5923f39-bf00-4c27-a49f-6eae9a0af2ae.json and https://artists.proofprofile.net/proofs/artist/e5923f39-bf00-4c27-a49f-6eae9a0af2ae.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 0x22775641413a3741ce7f1314f9bd40a9a778dcafcd42f33afd8a6b8fb85b5a5e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PT4CA1434792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b9aa25b07d942d4be78f84df7b1bd2cad9265ea3736adfece6ad0fc8349b7. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:40Z), 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/PT4CA1434800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46896de9a61ed8075bd4aa749ae474de2c8d32c44d8e93030d1a4aa8f80aa4b7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PT4CA1434806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e55296275a4ae11b95ae51ab428341eb1bc42aeeb5173ec7497d2d77b2d87c. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/PT4CA1434811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c63328f7f51f84a1a96ad7a64adc5941e4cb678b6f7c5f0e146f72f694d085e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PT4CA1434814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8df2e7e62164379db97dc642a3f5b2ced229874468636178082785788da89. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PT4CA1434819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80ea65418af547adb0c0b64339ec5d703b85a81bfda8fae321b99bd73225268. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PT4CA1434767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f777d1a7d181004de84256e529c3e01b5e4fac096df260cba131853f6b3967. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PT4CA1434773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd704b6b04fa25b539b214715262619e35a7b08d304290aa7e2afae359447cbd4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PT4CA1434777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa531153529bbce1450383ed0eab51ac28a3cf7bb740ceb39fa6d9a7767ad1020. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PT4CA1434778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b07729b04073725a446d57d2f0fb1c6448d4228a570116e4fe4700beea405c3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:59:34Z), 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/PT4CA1434785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeedcf6ccd970aaa045834543fccc24a225eba149da288413253da372b66293b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PT4CA1434825.