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 0xe94f87899b2855ddb88966a39db466e2accd16031f854128799713d00f7adc87. 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/dfc77c97-81b2-4a8c-834e-af56c09e46f2.json and https://artists.proofprofile.net/proofs/artist/dfc77c97-81b2-4a8c-834e-af56c09e46f2.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 0xd09e65c768edf11d3f77f359a8b7ff36fb92b520ab130a8ba2856186c917c111. 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/TCJPO2158544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c20b9de0fda8f610e15c498cd61ef9aa95b10a6080f943e2507bf81c5bdf6c. 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/TCJPP2172986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1ba2a53a586b67cb541ec31559d1a8e3d1306d31d9a406f3551b6b5ed3a3b5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPR2231157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fcf389803a1eaaffe33cb0fe473b912946eb555ca0f9760ce5d58fd9437b63. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPS2263642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba2d7aeac64282b0567751a4fc6ff936056b3deb38d6ab6d661d29db9aab9f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPU2209018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3970fd4a43ec2e272bfde70e9861ae78ccf83ce22c1304f3ce083c35d49b1ef0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPY2496774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3244e16260b13a491cf6262d3bce9a499640c72aab6655e5be8c5a026385a314. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCJPU2384554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866592460a9ddbfbdb6b82e34149c3707e6155917b1cd8d3241e157af2d978f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCJPV2308080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a2bfd7892c6702e4963d160b33e25e36d7cb00719373384a62978cf4c5cdb4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCJPV2353381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94db24d392a5b44c3ceefd75d630deaae4e58d5db5c52038f6ec11e5f2740bf. 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/TCJPX2330657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d4cfb4281c343dd8fdcb75de402c94db16179a0cb1706a844949b46eeac2f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPX2330054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8d66360cf910f132c4e2c07f8caaf4644d9fe7c0c2762976b812fa8ae398c9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPX2330106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8389ffaf956358f933a04f77e7bbd7a5fc6122ca28f1dcf483c0d14d13a05b9. 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/TCJPX2330142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd18e339eed7716ad7cb9553f6fd04d0c711cc6d99e413430ef68179a70d71d. 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/TCJPX2330143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8ffa52703b48fa6c11c0edf54ba1ecea62a105bb583d8bd67038cf63a3816. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPX2330146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d1b44b2256ae15c85a1942fa3abe8fbd68ef9afa83e752f5cb8d0d1beab671. 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/TCJPX2330149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e85f98c772982fdfbacd2f34ba0fe51e43c12ebfe73272159ff1f70b08fba. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:53Z), 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/TCJPX2330150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f39dd7b5d4e14452b678d74492223f3b4bbb87ac70a0505120a99ba5390fd40. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:45:01Z), 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/TCJPX2330153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845b3bb2deb07a2e5dba0d63b3f87fbb514af1ec2cc8c440b024a22a38347cb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:00:28Z), 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/TCJPZ2423524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75dd3cee7b304687a34b827f7ed6250fdf9192e5866fdad052c8eb7dc48618a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPZ2424516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c60bc4ec3f7bc6e6291a61efbba0ba3d8bc3e61402e4bc34ca5be300107f34. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCJPA2402199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b2abb7a926359172e92f3bd880521eae7cd09b83fc7db7e3921758e0665de5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:51Z), 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/TCJPC2475100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ae8a07d90ffa2d71616cbb7936272d27d2d3c7938786f1af775e51c7930326. 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/TCJPL2562964.