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 0x01b0e1390cf9bcb951a2bf19810091749850f31d8389bfc5f41c60441aeb40c2. 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/4d0e5db3-5e4a-4b34-b0b8-837858493b02.json and https://artists.proofprofile.net/proofs/artist/4d0e5db3-5e4a-4b34-b0b8-837858493b02.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 0x0c59fb64b8afbfdd107784b0b01ca94eddb34919e03fcc72e704cf40a40fa6b9. 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/FR96X2242911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817867cf5839502ff7b22e7347dad65f1c8c50534fde712b27fa4405a5345a38. 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/FR96X2242923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c2cb5371c61ed47991c0d501a1503a18553237c2cdc8f953cd03295e7769c6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR96X2242927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8220314fa7545821cff153f5b28a4413dca7270f4a38fb260a56be63c74cb4c. 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/FR96X2242932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd38eeb239aca3c4ae5c78479a70a5808d0b7fafac1c3b06016eee123a55f81. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FR96X2242908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e59e01fca2d40582a5cfb762cf4e3cf78d398877f9ae5d19b0b89e8a49e2a7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:24Z), 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/FR96X2242914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038ae2e74f0173151f79338f04222fa644930f8bff7c791dc497e4433c10fbf9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FR96X2242920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd55927129ca119a71342520880c0cbdd53db01b4dcee654ed02d00b43c6a5e. 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/FR96X2242924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f7176e408a26784efff39a87e58d8a46c865a3366e60f5f3936b1c889bb19b. 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/FR96X2242928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783262dc5e7fd5196cd42a2531e21c736dfdf4d09e2ed62900a3f24bdbdb274. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:34:01Z), 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/FR96X1805064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8c6ca95193914445acde6a6a6cdf5ad2597fa4940843b36abe1ada1077ef9f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR96X1805065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39856941b2d5d0034b62fb79dbd2220c89b0853ebf54234a755dd7df359baa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR96X1805066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03bd16556c565fa9f4194f17b8e805773698a12eeae559a4638b90bb3f9cb53. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR96X1805068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5498c0901a14101fd9d166970c8f19b2de80787da8cf6cbd0bae6e722d4a1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR96X1805069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a91f5cda53f8b2864f81c9b7f7fda2cdce1c9053338a82ef91bd754277a4f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X1805070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36176d4bc3beba495f79b34c4f06035d7c52b82196b646450db1fd4f41706f6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR96X1805071.