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 0xa58d9d0e6b5881e07c55286f0411936d9ef0f4c0087d263ac050c5aa0ce97b05. 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/82de77f6-fe71-4854-a491-eef22a3f7be2.json and https://artists.proofprofile.net/proofs/artist/82de77f6-fe71-4854-a491-eef22a3f7be2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
When the Sun Sets (The End is Near Edit) - Claudio Prc Remix
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 0x348075fd90752140de8a88abfc7e1a35b0f3c4eee5ea3335f701da3bd64ece39. 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/UKL9R1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c3d3fc36066baac827e3593768ce778005d635d8586579e8147bf9d505d07e. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/UKL9R1800010.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5042e8044e35a5f4df74667093ccefd8d0e9c892da09ee172f25e5a4e469be4b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKL9R1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d4e01074588409f65da714ae536da96502c95a6ae00b98177a54af2545069. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKL9R1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f99603ba196287e9784ac159b2cc59560e6d88b4091c1eb0adaf9f67810c6b4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/UKL9R1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba67dbca035e9d48b22e5e450c14b70d8ffe79188d36df8c895fdc633fbfc3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/UKL9R1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0ba7d3e99b5120293188354fd9fcf36207036113da0ff75a9b888e25518f3c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKL9R1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285d37bcfcded6d6b4ca66c21a98000f83762a67960eef807892329bd3633e2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKL9R2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c20168f506c0f8d74c357aa8fb9e7b4c743a60da1b50c7ff91e533ad832f303. 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/QZK6L2377510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee4964246f23e1d9ecdab99d579e44321965ef10618dfa416606fa763e3d12f. 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/GBEXH1900592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ad584d13667be368c475658e8b88eee7f46c8966f222fbf770d2238edc29bb. 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/UKL9R2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa10f4ad5cf1b76478e7aa0d6b2865ab2f07ed86da76d33b2e09778397e1cdc7. 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/UKL9R2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee4964246f23e1d9ecdab99d579e44321965ef10618dfa416606fa763e3d12f. 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/GBEXH1900592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf90dae81cbb950439cd901708181dbc9a53c30b380dbd1f7ce2b690f3e812cf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM7282352543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02051b6fb08998db1f79e76f53732ab5f7f3ac49b1d8d6e9ef143e6c8b5cd4c3. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBEXH1900500.