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 0xb7008027ecdd471dd3020eb2ca8b75091da903b0c90511bf4ac2c870b1a89477. 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/b6b9ca24-ba08-420d-aa4c-9c6443cf76c2.json and https://artists.proofprofile.net/proofs/artist/b6b9ca24-ba08-420d-aa4c-9c6443cf76c2.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 0x70e64c4a5871d5ef6b619a0b9742166aa75b32319ca7c30933885318773bed84. 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/QZHN32266154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13056f9b412dc608c4a235dff7947cd34299ce8263ea12194957968e72ba46c. 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/QZHN52266810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60e18635f15b14d69885bf6374ad3ab6cc858da02cce86be9c16f4e843e95ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:44Z), 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/QZHN82212140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1871cab88812d0d548d7eb349da716a973b146024442993e44987eab6bbbd3c0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6M2234746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6024fc05a3a4c8925e35a8ca8bccdb3d78e8e0b25d2aa0ca29ce37c95886b1b1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6G2275920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a805e8df4bd3109205578b0bad0f33b95705164081234587e68efee58eb37. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZMEP2226844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced0e5b7682dd16a0b45bcccb521dbacff785949dfd7b7efa7247fc7c6b37a3e. 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/QZMEP2292366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab3b5fe9e4b49b31718428a2c9ab8b69a056ce50e9f71a4b96ee277b4b06c78. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNWY2266558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd093487b5cc9dfadc08665b24187b0d9c0eac3b0ae138e250a1352a34d79ca5f. 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/QZTAT2288696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b2ea87e5a237f446edca24b260b7187cee4db17b320317c8c5cdb4a4b3e64d. 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/QZTAX2294124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892c131ce051f9db8ce612c36ddeac4d64f362139e4e0af4f3f6eeb65583b5c. 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/QZTB92253890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb85ba9a5e1bd03ccaaab510c0a446bd872c6ae22ecbf19b777c559905710da3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:11:06Z), 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/QZFYZ2352804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a4df667818b27b308af04845c7f860645e055050b3b3aacd6bd17fcd7bdf50. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:26:47Z), 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/QZHN52362219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285e36aaa46bb0079e1dc4a72859c24bb13e9a8f6e1d80a9e4478be864c8397a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:09Z), 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/QZHN52364634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c027fce6240529a2cf471cf64a9c76f3f5c29321e9324d42db12a73ca32e57. 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/QZHN62335686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf73067fb0d7e330c80c48cf9ba9d4522921dfb29fc80feb6a5c0bfa404e9901. 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/QZDA52388549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b97cabf34e610628d497eb5146a5f4e2895b07bd6ee82ae29c0d86d53c5b35. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:02:49Z), 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/QZHN52305380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd236a92d9b2c6fe48ce81c3af7ab554897c05c024ce78cd01bd29df4418c09b2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6L2350673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35a5abddcc92ef1cc3292c950074800ee09809c0cee2a935448ac155edf2b6. 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/QZK6L2350674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b778bbe170bcdc67e50e628b647ca76c2155d5f731555dec46a86e8faa28f49. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:37Z), 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/QZK6L2350675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45835cde6dcc4a24e15697c01825b8d383f7ed9e654eafce5eea544b2908412. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWV2390598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30571b9d8c71e5149d8bbf0b3b707a73394b84562262768093f581b05e9cd9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWV2390599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a77b016d75badaf235934b3623a30933f7dad745490199a759f5e250952f71. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNWV2390600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580c108f7419a7313a41f67a6e5f700513fa178b96c839445d351cb0f9cf8bf8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAW2366901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02efe3e119a3c89ad830cdfbee521f2dcc6ea3be9056f3c1f472dd526e616848. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTAW2366903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c733f6c3a4f912a67733ca4e347f0c837959e188d1e159c32063d7b97f5c6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:57Z), 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/QZMEP2471480.