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 0x9767d2cf195cfd817ea9f910566e17f60258e8ecef0f9f2d0dafb8b51e9d6988. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dcfa5a8-3224-4631-8a2f-18c535ac7c83.json and https://artists.proofprofile.net/proofs/artist/3dcfa5a8-3224-4631-8a2f-18c535ac7c83.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 0x83e144528dfd246b37a37af4e77aadf84917828ad4b2f7ef9ce3352a2acdbc36. 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/QZTB82287374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601ea3ebf49ee3419e46923a6c1ffd7bfb9dda4c680737a7cf313a414a9b1625. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB52218544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f64d40f8513baddbf988c06fcd4f0a5d30917302e19ab2221db063524060342. 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/QZTB82287375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8019f588d2ced6cd61d7cd8b1650210174ac64b716f4b6b81a6473277145c63. 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/QZTB82287378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c23fceab6d8d97a4e18f21c7a6da61df5456cf1f3c72f8b227bdc7d21f5d3. 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/QZTB82287384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53866d982ae5596a2010c21945281c483a85722588446d49de70eab68ad42957. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZTB92278349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ed4c01be5e4a32d40234403dd1d029764fb4bc3f35092f7d99ba7786ec4eac. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:02Z), 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/TCAHE2325932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7b8b01cdc03ad1f08cb105cda77d7cd84bc8609a95e4fdfc44ebe598349179. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB62332133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211091fca7e8448cc55ec92e011da50382d2e78f6de0655fc641e2ac7017c4c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB22378160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b159fb288debe2ed922c02e15879cc89091ba0fc1902748a14f0816c540654. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTB62345501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0510b6d4d06563499e0b99fae89789e00bbebb1ac52c5b7759f3a6398c0e35be. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB22380338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d61abea6cbe941f60a329dade9654e303b6271f677b9e9658cbb0e49a47c28. 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/QZWFJ2369686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053bc4d4552665581e8c752d418fae58303bb9775a7f2a62d9d0918462e40194. 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/QZES62350873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6be184ff369594137d00f42458204d4e8706bd07d88908d74b151fddca5dac. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZWFK2388788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc4430e0d9dc42cee8ef2ea8d35e6291a0f6726dbf5eac0dcc0f10abfcf75ae. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:49:13Z), 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/QZWFK2388790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7415c1c5ebc1502e780b48e77d931bb098d6dbaf67d1e2b724563dbe0eeabf1a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:30Z), 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/UKZGC2404334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca641e75322f46610b1f4afceeb700ffe937c95b4721a8dd1eca6b9b5ac0742. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6XX2559390.