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 0x2acaf5ef415c0b9b6f2ea87284ed61a95de305a2635b9db660becb0d7c196b47. 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/01a96627-f5c1-49f1-9214-be03b454387d.json and https://artists.proofprofile.net/proofs/artist/01a96627-f5c1-49f1-9214-be03b454387d.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 0xa72d1e0eed6d7993d1816702d78aab5f03824347aea3346b9bd84a62e5c5deb9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZJG52323349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad47208f3878fbd0cef05952b1350462939f018b3b31810ac8113717b344d97. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZZ7L2417427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e8512479ce1f66ec44ccbde4b71591c63f7a780bbf51b126b14dfb333817d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZZ7L2417428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5c631d8ee1fb387648934b670deee25eb499ef40c531793d8967142528d96. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZZ7L2417429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55056646262557ec5ccc13fee4dcac34b908fe8c7deac366bf61e3a5e2e10b3c. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZZ7Q2439400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb8e70d81b5146484327d98aec170412d02536317b46c0642bc19a3e1a416e3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ7Q2439401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeca2f2a532b3f4cd8e75d34e18da4d84dfde25191250bd564513c0f0e24e85. 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/QZZ7Q2439403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa61cc4429d4978f1c6984fbea5277c0229cb3bf5cd11eb4cb08a3fbc8a89f14. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7W2434197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ce17bce01f22980bb0752884891a5d3715f296d47fa3a7670042ff122fbef5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZ7V2485639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638d2d2ac6c2c2bc18f36b2f4aa2b0957cf04a60aca12800cfe93108a61a161. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ7U2409177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5307ec2ba558781c06ac493e17de49cf294e105ddb310dcd9d31620a8f0730d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZDA62546239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6776a743d656b1ee2d0f6ede77fd51f0f4f590bd755fe4977cacb4f6683036e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA62546241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545491eb5089efdccf2e5a2cc039eab4e180f8ac2f7fd2a447e7b56ab4a319c4. 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/QZHNA2502948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed6a3c214c0f465e261d2b2c2d5339031366e787384071f4a98a41d020514bd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNA2502950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4102ab29d7774b9242435f50025a3fb01547fba8c0c6b4b2cbfae93a2ebb393c. 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/QZHNA2502951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568313201144c44315e1b80485dafc678b01f77b9dda3dbb4ff4c3a09eca668c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZHNA2502952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc9c0dc0c4f5900adf81aa27556a61a55aeef83d28d5d482ca0a4d9751ff42d. 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/QZTAT2515119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6d5de843f469cd2c47bab908d10ded7b284f40714ae930b00bcd970a68d2e8. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZWFQ2582693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737fb30ef19158e28219482efb8efea6dc1a4e59858a04f130a728a00c4b296a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZ7W2569814.