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 0x1a8405bbbae1418864c954b0d72f0ff628f00c830d22222d1d52c5e1a11bfcb5. 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/8560d721-e114-4fea-8037-14c626f15008.json and https://artists.proofprofile.net/proofs/artist/8560d721-e114-4fea-8037-14c626f15008.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 0xec09d6e09b77ea27f6f57e6aff18f10f6bcbda2885172b8fd7751b28a3425b01. 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/EGA010507859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb535898ee362aaa70e348b6403186824fcb32d9213a53d9f79a2f93db1980. 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/EGA010507862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61aa81404a46d255c5763538643a88fdb37d400d9577b843b1bcae866e0dd5a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/EGA010507863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099fdeb45829bf408e730c51b8c5e90519945377974a23f559b35f7d53f6de82. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX5MX2151095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f84c33190bd20d7a0106ab702e3b2e45e97ddb5f1e523d58e3edf623a0b74c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:33Z), 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/GX38U2269626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317cdc62c19dea78b3d1d017a268a7aee4ad51416e111c75f1f9bbf966d2277e. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:42Z), 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/GX5MX2198925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc3eede38a831c04d1a5a6a304fbbdd6c78b521fd0b79aeed7224794d2ef55. 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/FRX201911284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2c2cbecfccdc61bcbbca397291722cd75a9965c54b3b54a8e1a1194173117. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX201911288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624f449492ee5e0adba5bf65a3392032d85e10ca04932af803c6754cf1c4151. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:30Z), 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/FRX201911290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748fba6cabd43585e3c9ce1c336b2c68834ed9082e4b47777b4fb2ca4303376a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX201911291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1478ff1c810428bfa82e0beb6ee4fe9eac5a36bd74f31cabfe6547d1387be2. 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/AEA149800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e8149022144e21d6dee2451a2b8bca8fb479e74d0bfb386a33def884864477. 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/AEA149800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239b4c768186d93ecc324c7bcf3d54a75b786b1d44be3e0e8d4aa5fc4277c110. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:33:54Z), 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/AEA149800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84672d7e39d0ae2082a4f822fbcc661a7bc2f7486072f95fa61e0045b48a98da. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/AEA149800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8369d3a879deed75e2858bcf1d698c526c4e5fd0b541e03725808516fb9ec520. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:32:58Z), 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/AEA149800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc68a82df7e7acf16da449ced6489f31c5f46b77aa3c62eb5f6f1530abbdf82. 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/GX5MX2151142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221eec7317745eacb492598e5b02a81883e4e62027c86cd7e8643e40a4e02dd. 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/GX38U2269627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdbed9dd2a7776e887fe0ca48aa46b64ba9aa6012864a7046b53ef8394b6082. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AEA149900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e53526b88e72d2f6a59d5ccbcee2200550719ecbb750e42b2c364c24ca0fdb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:13Z), 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/AEA149900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3facfbf8e7607d38f16e3d1e54b4307cac7988c4a8de1b10116873268b7a365b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:55Z), 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/AEA149900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4efd02d4054671d09e748253d3cbc86fc5034c16eff6fc845cda54fc74a745f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA149900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d8f1f9f85bafbbf4232df10b226b232e1a83dc47cfa527deb9bc5db33c2f83. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AEA149900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc791b8ca889fda23fad40a5152143735115aa8af08929ffd5b05c2be4e888441. 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/GX89G2202041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369bf76cebee1cd98c34db8e5cd6036d053e768f19ac7428a6e588ab8535e75d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/AEA140000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455921744dce930bb08fee0da7e76f2aa824ae6b3dce62648ba530cda4d487b0. 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/GX38U2259392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5704bfe7ac951552956b8a06e14a7b26556cbb169f29af0459029cf8d3b9fb6. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/AEA140400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aec580e0d828ab3fcb6f1e259de07d5478c27ce4d0dfab5b17b41914a5b9830. 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/GX4R52254664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce34a8196c07a9b5c2c79c49f58a0fe765723d5df89f7924dc85c0b30c96d5f. 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/GX89G2205553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dd8848dbe58fa5a9c8ab9b126e2a3460c42870073edf11d8e8de6ed8eac0d1. 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/GX8KD2234640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a9fd992f0454e5c19d467fe98b3a5eddcfcbd3d7a2a84544e66281c9009e4b. 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/GX8KD2235359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc05deacf6ab5bd3dd67a6dd91effa4fb5ff3d30d3cbb7ca0a7f89895909fcf. 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/QM4TW2108289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b89490950513d1c24b89446abf86e8564d4c1b4d2abaccbcbdd39a7a4d4acf. 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/LBA081102643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e474a117f17edd6818e327046f7d1e5a1aaf4ca6385c5759cf75211a5d25642. 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/LBA081102642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef228b3bf7b32d0e6b24c3843ba4be958b457439f33824660f73adbcdbd2f31. 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/LBA081102648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731f75140f7e1fcd6c91cb9acb355c550e2730e568f0ab72c7e7fff6f00a94e3. 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/LBA081102645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9979a5e20b7415fc88732e6166909f2429a788f82abc8dd33d22a7498c905. 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/LBA081102649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751a8dae9135f77c2edd6ecd35a650e97fe98aa0cbf2fbd94f1b17b7ca1f9a4d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM4TW2108279.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b64ccfbbbb6abe9581116df2e868c5c43eb94e623f552b974ea3235e784530. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/LBA081102646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb0b769aab48952d25be7f7833fc49caf9b4bf8766ff511d09fc77578a04729. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/LBA081102644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a944276ed9976d3175ba4de0a23e6718ec38f4da31d35d78069cdc1cfd47a81. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/LBA081102647.