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 0xd913978c26d80a6b82baee4fabc932b2909bf8ef01b07deafaf4f3588b747692. 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/ee2840d4-2de2-4294-bd48-40c0f5f9a8c5.json and https://artists.proofprofile.net/proofs/artist/ee2840d4-2de2-4294-bd48-40c0f5f9a8c5.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 0x3e67a9d4074223b827c9f0d78d90848035027c28f7579372c16fdd32b40c01ac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2165912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f0c623ef0dc94e087dbed20e0d0ac6c35fe16e9b605a8db0490f44c410855. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2299099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e70eb0f08bfe9f5ebd7acdfe24b78797a9d66f5531d98fdde5e2697529faf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2229247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64950db9ba48cefdcc36fe2b3819ed3202a088ae24d8c39c20008a3ce8555f60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2299101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726caa66cecff480f6cf44fcb3a413104afee13a6c8e14dc1ccefa11b18b0ed0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3DF2249539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470825381751b44da6f0fc7e8d72c8f7fd17a999aa591cc0b2b2e3908ec7fc8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2215000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564b19e1a4e334657374f426f816ca06106bfab15cc21060fdd8c77258015667. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2296851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e64f69f76963762bc798d6a6aa4baf0dd2341f8994afbe9f11114ff192690c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ41924013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd975727dee11e682b2e52e1086ffe31c2fc9cb9c7db44a2dbe773f7be0680d9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM1956889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde64bd8331d3b681c0593d0a5acf71c1ba9d2e5014778d9c4e67cb3c118a933b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2094382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47149091db70241928be6f52ee35f7f908724c7e4aa1223ce04f90175d6f0d8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1804020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a82a6c28b92bf2597d41c300e443b8b3bee3ea2cd7d50fe5b262655c342cd9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS1987945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86b58303bbd440432732845b9cd1a9639adbd9915e2b15953dc42cfb1c43544. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US7VG2094385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dedc4a4feac93c6034bd463b71debd0a22660b5a8dcbb7dc42febcabaa5bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ31996231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70a2682e910df97b978ec640fba8c856225ea018da2fe4aa2c2eb53741817b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB1625881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd263ce05e972863f2c9dcef39adc6cd0726e672c0401e49bde35488efb628a86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1625528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cc83abc8014ee30224b88d1c3feedbb8e602612176b7c017f7691665c1614d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1625529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8b7d4820d57697cb949fb9c5c663f586f3aa4a85be693ab26828f4a5532683. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1625530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a91c28a3554905f738cc78482ccd512db16dd15f6e829440622faf51e02fb89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB1625531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99acece848d646b6f5f5342c8c0bb6a27234bbd740e9a24b26c4fa54cc5f167b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB1625532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef19eeb6e37e82d1267d99d6a9bc4ce427a9c13404c8210450b30adc6cefd9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1625533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebddb9378cdafb87b56399197a2b30e06377e608b1ee8a2f193b8b18d04fb700. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1625534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f59f90f0487ad9b8037678bea6ce70cd8e7881a5b6f538149cec404c65ab71. 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/QZ5AB1646387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c33c66304e3bb2119a58f5c345d354a5bf8a4c62f5f23f26bbd8ed991b852ca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB1646389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395dc03ea341f18b6f6563f2752b67c1f17673f3c4816675d62ef647bd4a74cd. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZ5AB1646391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb303855a413250def5494727b066dc0320d766b70bf67dded9909a9458d4e47. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:49:55Z), 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/QZ5AB1646393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cadb58c3c216126b1e85d1d5da31e3dc513f629f29e80b69ab36f605798126. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1646395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64950db9ba48cefdcc36fe2b3819ed3202a088ae24d8c39c20008a3ce8555f60. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2299101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470825381751b44da6f0fc7e8d72c8f7fd17a999aa591cc0b2b2e3908ec7fc8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USANG2215000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564b19e1a4e334657374f426f816ca06106bfab15cc21060fdd8c77258015667. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2296851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726caa66cecff480f6cf44fcb3a413104afee13a6c8e14dc1ccefa11b18b0ed0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2249539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e70eb0f08bfe9f5ebd7acdfe24b78797a9d66f5531d98fdde5e2697529faf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2229247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e67a9d4074223b827c9f0d78d90848035027c28f7579372c16fdd32b40c01ac. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM3DF2165912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314da8b6e250851c4379014a606bdc1a2e8983a4a34e900a8fc6248c4288e04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92097311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dedc4a4feac93c6034bd463b71debd0a22660b5a8dcbb7dc42febcabaa5bf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ31996231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a82a6c28b92bf2597d41c300e443b8b3bee3ea2cd7d50fe5b262655c342cd9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGLS1987945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cc83abc8014ee30224b88d1c3feedbb8e602612176b7c017f7691665c1614d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1625529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5155f2536228203dde0f3e1b3846c0da911452f526e39776d1353dca970086a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1793468.