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 0x8a637cc6410a38dbbc0e7ab4af1c5a07d101e8fbe1361fc6321ced3c8c3894a3. 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/01e04896-3150-4448-bfde-b2f357e27252.json and https://artists.proofprofile.net/proofs/artist/01e04896-3150-4448-bfde-b2f357e27252.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 0x5843e106b38ebb7484267a64a7761637c805e71964513960caf67ace2312a9d6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/AEA0Q2097742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20affa2be81ddd7f0a31a53fa6fea60f6b185ebea82e5ea6685ba9d2b4a03aa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AEA0D2004889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39421f45819e76bcc6eb44121938872be146969c60e035ce5704e145f9deb3fb. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/RUA1H2125330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aac5a5fbdf131afe515592e167fc474bacb957b67f6d4878d3fa66d317c978c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUA1H2125334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383f7daa8641f51e8451b7c0db6c9090bf6981a4aaf43d1d7f6c868ef7019b6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA0D2125725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5765e1ed834d834b5b9b6be57f6d0e21f0003fa306988668cb90f850987a98. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AEA2W2286671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccac9ffd7c403be156ee712c56681f746b2b48a9c8d7b6de2ad7b86cfe0b41f1. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/AEA2W2286677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812821a695e51d7a3ef5df3b5d2f70eae4c704225265d97ec246637759e14bd7. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/RUA1H2309729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bff0c9d7f94b9ec1bc1edb4fbd3d7afd4389f45461f2c7664210bfb7cdf616. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/AEA2W2360971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2105723f929b633b1d64793d8053b16202bdcc370ca000f1e86daa1033e02d. 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/QM6N22327780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32e80eed0fd4cd2986600d088bdcf5befaaa7b5eab1edd7a841f8fd14aad271. 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/AEA2L2334364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dbe21dc976411d2737c5df73a4b15e95c16147c20a3083f372f73bedaec968. 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/RUAGT2334536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c64c1789f67ce6dcf684641720036eca68f1239477219d7d34b8e3dd4552c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/AEA0Q2431731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cde455f8ae3e31bf2448e39aa618725383650165cc801fd19d63956198b5d0f. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/AEA0Q2489157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d69366c3ab3d8275fd64c76e03c5bb4262d53f96cb1d0b4f797aeb8ecbb62a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/RUA1D2505853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2422ce47c3d96f5f54b637fc6d5e6666b9445b8e420578e7736802f8090108b4. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/RUA1D2511656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d7d9cab274ace854dc1009fa97f3aac076ebadffc696925bd52120b846d89a. 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/RUA1D2511657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a4d018040961bad3af75645b47242e99244897fd706f828c74c45c952ccf4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/RUA1D2549519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeff813f826218a462a8ffda8eaecc9da10f2ed7339d1b6f997a6ba5a8d0af19. 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/RUA1D2549521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992a4a36f3f14167b7982ce2ccd63cccbcd4bc9dac98b63bdb9ccb1699b635d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/RUA1D2549523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3507b926878d6f834c332c3531f10aa2e76f2f714ad21b2e68314ae38f7b48fd. 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/RUAGT2539078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6d707f17d237243193406d77a26730333f6c9d393b8b5f2f1729fe77201bcc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AEA2M2538089.