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 0xe535355e3fce28d21b905006db008aa96fb411c4a5d6c3ff8231e0e9608561dd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b0535f9-c4cd-4d6e-936c-290f0e0fc996.json and https://artists.proofprofile.net/proofs/artist/7b0535f9-c4cd-4d6e-936c-290f0e0fc996.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 0xd59f2d96362d7ddffbe312cd16e67b20aadb4d2afc4e05e30291053c1039b5d5. 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/USCO91258402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a376c0fd20d693c84eccc6ad598a6390c3ed8162302467e73b6f06693003f3d. 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/USCO91258403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06d6ecc34790324f0b2703e258523847ef0c24652b8251ffcf470f6040721d7. 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/USCO91258404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd68a9eed3007908778b525d960e4ca4a963820f4817ec67ec50965d77812d44. 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/USCO91258405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a54e469f87dc2966a7aa5d0002c6e71f82292b4aea2752027fac1c4c9b95bd1. 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/USCO91258406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd63271adad69f0253b61a86d658fd2a76d3fe7b18d88d6cda83f1cdf1144fcd. 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/USCO91258407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde201663ba25365963bd06a9fe656e9651b21f13c6af9c38c83f677cf9605e70. 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/USCO91258408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4248019e59ed5225af7d3ca752e9c06d48511655bab5f841941aa0756c8e4d4. 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/QZDA82213361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1192fa320f0d69515781e9c2d03be735df5b4b2bda61b14df89ceeba605743af. 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/QZDA82213362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e70131fbb6401423a3e7b98b258da2751133c5cd55e36ae9f78da3f794069. 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/QZDA82213363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6261496005875efef134e32bda6a416a86d748a97f887c55b0a0aebf60518c7. 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/QZDA82213364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a799e018954c3f3c5df3fb8a964f6746acffebaeafe9198992b6fb2bdaa989d. 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/QZDA82213365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf181916ae45c53b61f256483c352a671937174e1ab05f3edf7651339847348c. 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/QZDA82213367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc79dfdbf3e38c272758e56edf8e283294da858ecebcd7a92e91be8246aabc56. 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/QZDA82213368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cdc1c8be50aac903dd15410a64bcd62554267dad71395d87d8815615af7cfb. 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/IEFWI2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b402257cc3474d931fedf72f3d5820334eea9e14bfc83fc9dc6c547d0bda9. 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/QZHN32127757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48a7cdbf26f47d06024d4bcd35b4405d8771f412784717a23da3a6d986806a5. 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/QZDA62122102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37300112a1d78e6109912810d362bd59325323717cddf8cc2ff42a4c2eb9706d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZFZ62126790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d198327130f01cb89132f094c1e2208e3bc8d9645d1f5e2a80372da2e74a777. 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/USUM72406304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb238d52525f6b554b5134003085baa0badbe5d90bb529fa9c1e5d16eccaaf883. 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/USUM72406432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ad0b429554039c881fd71d5fbab3d53f1b2a6c0bc1e5b4b557f455cb410f8. 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/USUM72406433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57ae8684a108401541f347c8e5f27fdc1c058a4839a0c4509d25668013f1991. 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/USUM72406435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb4483471fd29bf976443522bfc8288f38135dfa142790a97c9f3ecd078f617. 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/USUM72406434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee8b774192543a09fc9f382614c0a3ab33bdc0cec073984f86a7add72a7e42d. 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/USUM72406436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb43a73f28bc596dd4b181f2f6f82955f203140ddbf1304368f9ac85eda1417. 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/USSM12404686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66c6370204ed27d6545e684dbbcadbc1d4309d7fe0875007e834a54d6d9764. 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/USUM72406438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25a3404e5beced1f48cb6661cbfaeb0ed2e04f469d006dd343549f6f88bb5a5. 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/USUM72406440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f92d161558d4fdf29433cfcc7649f66878a729a79191eea8d22a566c56c3a0. 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/USUM72406439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc63e5c8c497652cf337111bd8283b54c4f98a57ba86fb15fc847becac1c5345. 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/IEFWI2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cb8577ef1cc44aed83ea9994a122272a3bc4d8f7197c05176ee1a76ecfaa08. 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/QZNWV2161501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f6c373d7db732bc73ce0defab62df8c008ac570b750ea4db4ea4a53fb71906. 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/IEFWI2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deab0e70ab6d9e294cd3adae5d9ea33091ef4f8018b25101397c9c1f0eeed77. 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/IEFWI2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f58733a2c473b8034f6ea0719c5a09bc5a8399526c1e68c3cf13408e4bf0d3d. 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/IEFWI2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e45fb67101ea8147757ecbc74f0bf2dc6e1bc213e212a79e1e545d86b10264. 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/IEFWI2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68de0db73ccc124fd25f6cead1fd3e9a68b922599f85ad6b75a60fd6114ffc5. 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/IEFWI2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cdc1c8be50aac903dd15410a64bcd62554267dad71395d87d8815615af7cfb. 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/IEFWI2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6864bceab92229085291b4e86612df3f1b31c7a15334e0ba2063f56c9e82e271. 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/IEFWI2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe186efc3660f9c2bad09d65c964302110cfd13db8b746305b3fe770376d8d. 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/IEFWI2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e9ea646fe60adc80428ee6f64e3f4db851bb13273058de69536811e6331ad. 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/IEFWI2200010.