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 0xa5281c6a1b8116dd6f69d842dc1eba835f6627f95032e6f929c3d9cc4c02ae12. 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/3753edc9-a650-4ef3-aae5-f4c6425c30c3.json and https://artists.proofprofile.net/proofs/artist/3753edc9-a650-4ef3-aae5-f4c6425c30c3.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 0x0da86dc291e3c131aba979f195fce5434a8724bb9e4855728767e9e8cc1ca677. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:50:21Z), 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/QZDA52042238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6528c79cdd9adbe2bbe9180b223bb030a3365ab43cb611e2ec63a7268f5cb952. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZFYZ2119169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133daba8f4e3076a2fef1959f527750633da400226b5511e8e4c38302c0cb34c. 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/QZFZ22238069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7149487fb4b9b3827c585a85efff1589c1c4f0a3a39565aef3421bb4fd62e29. 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/QZDA82255910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8597155205c56023dc1de8df280c9f53bc7c4ce6d7092e7edbe1de4f32a10. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:05Z), 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/QZES92209242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a090e982521754ef6d70530b4926cb35ee0008d496755c48157724b1c43eb5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2265090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe7c9c14da8b0a86d5434bb79fcb492a37df0ef05ff2123cb37ca3ec3fa8d7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6M2215052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8597155205c56023dc1de8df280c9f53bc7c4ce6d7092e7edbe1de4f32a10. 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/QZES92209242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7149487fb4b9b3827c585a85efff1589c1c4f0a3a39565aef3421bb4fd62e29. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA82255910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c4a13412e8aa04acb0e4e2cdd2360a4b8a91304a513bd8ac518e88142e285. 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/QZK6M2215053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb578b488443a0563b2cd177ee9139522fdf5a8f2dc9e9b70d7d12793e9c443d9. 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/CH7812224231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32cd638a122358fea4ec5ad0e353687bafcbdba7a3ae8c1f6fae59b73f57d74. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWY2282197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f835edfcebddd2f184c8cec33f88cb0bb72b88495b54a1c19f16d41a562b6. 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/QZRP42245852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3bad67e43a45cb7d2bde4b87f65e8b44f4e6faedba34bf4279dafea51a690d. 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/QZTB62214772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc3ec1c4828483f8f5cd5866d31d3d3bee52ab7fc89565b10f1bad230d86782. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTB62214773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff676165603b7c49e41bc15db0013e59c3a7afa717d87e07d844f4b5106265d6. 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/QZTB62214774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d5fe89c412c29c51dc7da55a2358cfcaedc39d1d8c8a15868028dcc3536a5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ42386949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299619b54b20a281df9b0324af8dd19c9c811c38db75dfb8b770c514805a5ad2. 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/QZES52340563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae145b791ec0d8a9db7f183527a7b4918607c6c16df2465b60e0cb2806341058. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN42321205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae145b791ec0d8a9db7f183527a7b4918607c6c16df2465b60e0cb2806341058. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:37:58Z), 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/QZHN42321205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d5fe89c412c29c51dc7da55a2358cfcaedc39d1d8c8a15868028dcc3536a5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ42386949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b68e43a7d9b6bd0342f6615b38200b68f65cdbb228ab77fee76850176eff2ff. 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/QZHNC2314294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2479a596b7d5df0772f8f62b8d67b2c2631f7c8fd14c009ce16a0d4570acf17b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNC2314296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d69d3159226582fc5c23b94ba65e6dfe675e4f04e7786e9f640c40ea6a34a9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHNC2314297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb1252b0fed2056bdb675e3d0b4533e6b1b9623dc5642399c3d6adaa38f315. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNC2314298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f71093ea3279573f51b71699e17c04a1f634416130d912851d763d2d2b6da7. 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/DEKF22300741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f4b6f78360212547175e484eb45bcd7c061a0820aaabc5d6d28847277e65e. 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/DEKF22400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43718ded88e6a58c90f56bd5b25952a217191f5202f4cfbab3d31262942fb055. 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/DEKF22400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dd07233c684793e8d6084d43d635906500eb4000a191c1c1a399751271b301. 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/DEKF22400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb059c95f8a28019770a0a4f0fdee8b2f347f528ba71d6be5c99305c08d40f. 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/DEKF22401845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8205ab2440b15103ea7260bf4cfec2a02d29345e5d9a3d24a183c62316a3fd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEKF22401333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00a2a7d8d3e0e1e052b0e7812cfb9a33ce308f1747b284c3345ae697c86f98f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEKF22500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8177af0162742cfc555c5031897b704d44ba3fa9c167a2cd4f062816b6744. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812370150.