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 0x3aa85966b7c86ba7c73a612b28fc4ee52cb2444ef586e77b1120be59dbcca852. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d855ac47-3662-44e5-86c5-f037404144dc.json and https://artists.proofprofile.net/proofs/artist/d855ac47-3662-44e5-86c5-f037404144dc.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 0x233809e963ee0a85cabbc08d956c50d0b9385f0911f1ef067dc505864a7d2c3a. 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/FIUM71500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb0d97e027fcd570d37aa09acdbb16493ac826fcdab962c72a33b1be51d7c81. 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/FIK5F0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79237755a7a703f19d7d966c1b8009fa17ea3de095cfc880cd4ce75331372673. 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/FIUM71500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4228eacb139fff6230fd8ae044e8393338cbda1cfb17175786d1e4a451943aec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIUM71201281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d14bc8b3db86cbbdb22a76d85fbdfb59a954ce5a0a59ee26cec82df76e4385. 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/FIK5F0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b85c6fb7992cbb547986380107ce7f4d8eb44feb2248219832632a7fddcf92. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FIK5F0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd537388499e8e2c3c600f284dedc64cd33449ae0e7f017d52bbca83462305. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FIUM71201641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32194f9321d2456cf8d268562b5e524622f24b63a7c92afcb84f095b58ae6ecc. 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/FIK5F0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a99e33b00788fbc31824c47a1fc5284f6fefa44ff04380763092f8d1d1f0bc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FIK5F0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eac3fbbae9211e6370d776472fa3e03c6809554336425e944b089e925a0001. 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/FIUM71300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147775626ced523501a1f4e24272384533e9c3b3f4c99b121228abaadc0e6e8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FIK5F0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa349c5ad22b9a2b3f00ce174d96b8d2b0685137d1860deb97a80e44cbd6afe52. 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/FIUM71300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a82ddf7fa3fb65d08ee01ec55492c32fcbca11d43d9984a1a30d37e4cf8278b. 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/FIK5F0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bcfce811247288e76e24b8b5f2cf4409fdb17915f6e941d3bc9b89c8657ef7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FIK5F0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6ab59f736af264e0c5c14241dd8451a9bf5ced5c5669647bd96a7427bd3b7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIUM71400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832cef972aa7b21d49534010fdf0c7d7ea19534b02efa97e2fe31265a8c6212d. 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/FIK5F0800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65acc94b579a3827e2af49c9bfa81aae4e36a9649177b85401983092d0a00f0a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USV291475909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44526ebe6c317ac0cc4bb4fafa98bd593ce0e694ad6403f25940d67c923321. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FIUM71300987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aa7dd11088e26154d7b87fe36ed868914501459026b0af10f13f7bd42f212d. 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/USV291475910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79acd78877018485b90e0714075173d1a5ef5d56c70ce92f13de0a809b3b7778. 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/USV291475912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb80563d29e1d86b4d790039b157c49e89ef09b6772f739ff2592b562aeef067. 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/USV291475917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf785741e44bba2bcb7301dd8f1f518936330428e6b7c4f108de0ccd0a42dabbc. 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/FIUM71400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6ab59f736af264e0c5c14241dd8451a9bf5ced5c5669647bd96a7427bd3b7c. 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/FIUM71400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edc28bc810b3ee61e402553c411b19520d063ae75485591d7b1971327dacbc1. 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/FIUM71400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71023a71e4419a80239e4cb03029a0a2a7b045823db67c9c0d138b0338a187e1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FIUM71400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f5ff2f6475e3df910e7456dd18cc589365ce2cc42db55a4e24aef71490baa0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIUM71400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073d7c966fb28f7d04b5ea13d81252ad3f0ca16b938a6332bff951815ea090ac. 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/FIUM71400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37acd07f674df3f60791e3e96abbff49b075e3495d3d0ec7481ec4c501622f1c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIUM71400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44526ebe6c317ac0cc4bb4fafa98bd593ce0e694ad6403f25940d67c923321. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FIUM71300987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4228eacb139fff6230fd8ae044e8393338cbda1cfb17175786d1e4a451943aec. 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/FIUM71201281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ae241b5f31c3e23750d808b29236f7fc934ed6ff5949570192fe222bfd9cd0. 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/FIUM71200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a8e5d825191bebd542bd803c26f87b3527e165eba0ec597ec292baec41300. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIUM71201639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4eb0a38e99a37ed56c7b4506edb4f8bf16de0e8383e114c9ba7c47f5719d6d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FIUM71201640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd537388499e8e2c3c600f284dedc64cd33449ae0e7f017d52bbca83462305. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FIUM71201641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef2fc5d5724a018eae507a5593c4b01aa61cac0571ba7f985fc8c8bc2b5ee27. 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/FIUM71201647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873e8f5f2788772c7bd3af5810f0324197f100b773ef1a5408667cf4401ceab6. 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/FIUM71201642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f403d14c0ccdb74fc143bb4cdeb83137c1c9531224f9a9610c24b79c0ac966. 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/FIUM71201644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96360b3839f12eeb101b78d8f96cfdf75d2ada66964aadd01aed216bc366b051. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FIUM71201645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a369f4ca665b7f340937fd4f8a8d42aff17f3c0f3f8d9579d566a5c211d53. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FIUM71201646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d6a9257453fd0b17c35100bd1d60e12ed4be0ce6424b37b4b91b588900e5d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIUM71400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ae241b5f31c3e23750d808b29236f7fc934ed6ff5949570192fe222bfd9cd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIUM71200225.