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 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 0x3587d4bc20cc602761fa777fd0ebc1312ee7e5ff86ef8e60c85cde720f588bd1. 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/40be4d18-b682-4680-8551-817926148e2a.json and https://artists.proofprofile.net/proofs/artist/40be4d18-b682-4680-8551-817926148e2a.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 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 0xe4444fa7aabf8cfc1af63db9e513c2e59eb5ee19ea5b28ce0a2d0fffac973efd. 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/CH6541776017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fbb89dbf7687130f70e5a6a82789e59ef7fbcb3a9eecdd5ca4bcfe19995bd5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CH6541778122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa8fe6d71439d2cb9a0996825402f892f6edca61c92bef9305a2025dad69d7. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/CH6541778116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf410db8643d7ec8f95b968602f8c1380024705001cd137ebe690c7a990d0c87. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:04Z), 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/CH6541778121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450647ef434247d9acbcfbf50b2c9d5b6402d07f0e0b6b373968be88af912189. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:41:22Z), 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/CH6541778020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3edc438ffe7e4347ada3959266899aa409db4f7ae643b72599773d66dee72be. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH6541778117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08424240dc1bfca04ef4a15daafb73de3f0e602120b2f13a0585e0e57f154c17. 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/FR26V2018825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110d58c0124eba3fbefedeea6a1d2cb54d0d378514fe0ace56239cf88a469042. 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/FR26V2018826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0ed8aedc396558eba0cba349e5dff88d7033c50058d905578bbfa368aded61. 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/FR26V2055465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14623caca92d283bd4a73f145cec1e8fee8ee3bba7075412a9034c482b12e1f0. 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/FR26V2018827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2203262e2e9b9b280e5de6bb85c570260c4b952a6a5af969c5fe713e2a933bf0. 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/FR26V2018830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58d26ac696d321e84e905a209a054604d9eef57ae2d29e1b94d7620e0b173c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR26V2018834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb2d9b3c47ab6ca177d94af6649bd9b0460100a0e687fe53793c9a9bec6878. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR26V2018836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfe519d04cbe7aeac0ba454a572a17a25af45dac47010f94ba826d8a5742a41. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRX282143554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c944f3a92bcf126a48dae18a17e1dbf72b9b283b5dbed0e447dbf88e3dd973c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR9W12207668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2730520228e7934456558680d43451658c967e81f533ba2f5c64f75e43d108f1. 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/FR9W12213784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c944f3a92bcf126a48dae18a17e1dbf72b9b283b5dbed0e447dbf88e3dd973c. 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/FR9W12207668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff1e66e2bcb4f4f41c5176be40f6837c72e574613701236185a71452ed2927. 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/FR9W12213785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2137f131abd7c1d98994c7ff0217ef6ea7cdc6a02ad54ae048648da27b5a2e24. 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/FR9W12213788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e4c40480fa7144a3179e81df9a83c8b41be707611edfe8845ef3bf60d94953. 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/FR9W12213787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cad302031852a90530373cfdb450264d552eb81ee4cd72319e399790430e2a. 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/FR9W12213789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d905a8af348662240f31bed7ea458df7ad7a5caeaf44598c6294601efc7cde. 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/FR9W12213786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5dea69693d4bb23d1b1da98441392ac30e08bae6bcfe10da98ef9a862d1513. 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/FR9W12213817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f85cc2a470a16d14e0bc06ca2bfa09edb2c58cfb02f8c2de30122f0862e43c. 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/FR9W12213790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952763faffa0e7641f622b77dd121c34173cff3e0314c60cf8dc414a89210eea. 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/FR9W12213791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa08d16b9d1f86f4455c40bf89ca1b3687cfdad4f38eddc27d185832e0629eb. 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/FR9W12213792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c308ac788f59c18138d531d8662b4fcb1ea23b0b4f9bd982f88722ffd34acd7. 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/FR9W12213793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbcce44dcddd0e02a7188f2f24bcecf9670f5808c059140d89a88904b7febc2. 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/FR9W12245177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823d0c188e082aefdc3f13b744474ea6e015496fea67688a4ccc501a3e458351. 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/FR9W12466315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba7adfe8ead0649105506a6fe1052daf503e46b4ccff5d2e8d5a53a158854a1. 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/FR9W12466314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367e40bb3db76098c32a44858d5ad8bd52dcf9a7dbb788310b8aeda661db97b9. 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/QZTB22205085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42003929e08bf520658f6bf11bad3d5ccad9b599ea1ec68a08af5c9e05fa918d. 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/QZRP42231109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367e40bb3db76098c32a44858d5ad8bd52dcf9a7dbb788310b8aeda661db97b9. 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/QZTB22205085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b077b2a45567c365b413c27e9bbb2a969c53668376edbcada0332ba597d20fa. 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/FRR642001698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d06216ca88cae41e77d37a422eeba38f2467791956debaac05d1e94514b9fd. 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/FR9W12234682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42003929e08bf520658f6bf11bad3d5ccad9b599ea1ec68a08af5c9e05fa918d. 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/QZRP42231109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eae9bc52881b75b31aa6e8806f4192a39fe7f0b5c828a8b26e517370dc1daa. 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/QZES82274406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704c2a668571b08ccf10db9b1a2ec36446c02fa89c5ae6c863f511f009b4c307. 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/FR9W12219545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f17c6fcfa8b2e1b651d801fbacf81b185bf26a1e6d962a9e9254107bc2200f9. 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/QM6N22017934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa258ec916618e27511175d158c0d19bec80a14ed8aafc38e11e72fa703d98aaa. 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/CH0012100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bdc85dbdd59b3f7fcd57912b0cef72627d0b2ccd8b471feaca235a2ecfb2b5. 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/FR9W12130834.