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 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 0x94255c61926c41a2257a75341213f9c0939414d03719f4632ab7bfd191398697. 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/30063b2b-ac2e-43e5-b27c-8323946f4f67.json and https://artists.proofprofile.net/proofs/artist/30063b2b-ac2e-43e5-b27c-8323946f4f67.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 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 0xdf59fec10d8c0230cabce9f1c5d2d5b38e3f2ffdee322f7997a6ecea770dd106. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM42K1849456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57b30aee4fafcfa0f76bcca21f0ccbc47ada0eb203091bbb06145a90fba0880. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM42K1825210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2a732d66826ba26dc0652059d78318c455360145d933bb52ca565c68f49d42. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM42K1985474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe14b6046344416f800790da39ec66dd05aca99ad12fb205727f8e65ecffd79c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM42K2034406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c22f4960f33037440c8ab52c760c6e3a1be9194b0794dfb6238a1896b19bb3. 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/QM42K2055030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2e2e5801836fda9343b8d491f8b52bb55394a8969a6de3f954bad973ababec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2195682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcc1c59bf043d0e92e04ca0fe1bf792b2c7f14f54386ecf6b43a60e68adec5. 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/CA5KR2227115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dec1ffaf24ee5e2e872efd1aa8eaf67632168d4d3989e47d99032efcde3c29. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2227113.
When The Levee Breaks / Sweet Leaf - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8fca07ad5731f2c5de1097e5631e5a7cf46cc84ea0d0a7b8a6df324c59f48e. 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/CA5KR2374999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef1c1d5de106ad4fb808c744c9d770c3aaeb1d3f47e0f2bdd2903cd04aae018. 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/CA5KR2375000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb024b02c63c91b43dbee8bfe8544da13ea213aef110e8acb42b77b49af5fb3. 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/CA5KR2375001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d58bff428f2dc9ee6401908ecc7cd9ce3159106201dad4834c6205441e3000. 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/CA5KR2375002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a176b3fcb06c4848b1db4420f73e9fb90b8864e5af840f931ee949e465d01b. 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/CA5KR2375004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4682e1df28433b6f3cec1f0fcf59b3614afcb7f973ea4db129b372256b71c92. 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/CA5KR2375005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1483c4818e572146587c4669131293604e24577f71af0df45844a180f3befa6. 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/CA5KR2375007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09248c76dba82cd4ec1be1db79e5080944eae31d861a25b91fae0570b0c237e. 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/CA5KR2375008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac7fb90c840b1c2f27696415c8dd8c5cd59f1614073f9cf88bdfacad84f133. 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/CA5KR2375010.