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 0xb389ee8fc6e618eb99b4afb96b673eb1771d1dc50095b40e142074c8f4d74e0d. 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/c09bc70c-7b70-4385-9fdf-80aac9430450.json and https://artists.proofprofile.net/proofs/artist/c09bc70c-7b70-4385-9fdf-80aac9430450.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 0xfb5a6cca42a8d0ffa43dd32a412d2f96a365b053cb36563c91eef7817968e1e1. 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/QZ9Y21762382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415ad974819fa3fcecae12f0858cdbcaf4251e8788d17fbf0af17705759b1f5. 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/QZCE61860980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f7e0ce7dced15b796f44ab99f0bb3114f17b9c1b6c7f2d9fd9496aa93ad01c. 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/QZCE61860982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8526c161c1771cc7eeebc4f45e6ca0349554fb3130e32f34634f9c9226c244bd. 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/QZCE61860983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc341b518c8b493964870329b6111c4924c994a6312e519b00f8eb2768bb3b20. 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/QZCE61860984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881e1ed2d1ffa7720ce9f1dc0520df023c2389f930c2096a2dfdf6b3aa293ebf. 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/QZCE61860985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5500b2502dc3623069692e883bd84cf86732c8389f6cc7d909aa5b2efd4177c. 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/QZCE61860986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd43e8ee5e1829c406314882fcf82076f4f9d25d3c3409171b0d3667cb7d6665. 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/QZCE61860988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7ce79eb542a445c5780a7fc5c6cba4d865bbe5e342a080d917229b5e197e81. 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/QZCE61860989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59c9cf252ac7cfa2eba2f1c1f7920da9825276a428d97b340c8ff22dbef8e8. 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/QZCE61860993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2a5de8005c0293a2036f1268217ca4637be66992431f735035976486ee6648. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZCE61860981.
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 0xbec611af81d98c6dbd671ae5f409a7052c2b1b9a398c05fd801fda2ad300272e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZCE61860987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0862ee7d4f345af4fc18d3068cf2ae53f330aa99d7da11ac1ff3592df4e4fc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZCE61860990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc40b1d726c51164cd629b587c300ef04d479549cb299376481a4559a92f34f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZCE61860991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128efd7d66be917a3c26238efb3baf8c53f49939a9f807f17e00a793d375c161. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZCE61860992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf00f334fa27f40fb14db472ef2d06f1d48961cb59942f065d4df028ab960c36. 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/QM24S1911701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169d56b093212b98d190091c771f116de195c8639d70f0022958d81c0d1f3440. 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/QM24S1911702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02b5fd9d236048bf4f4288f10bc7308130bdd4bb73d8c28c51fb4e8924f436. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM24S1911698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a876780c99d8b079113df51f2b1e76724ea7323401fe4b58da927bc6497b948. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM24S1911699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d5abe7b44eeffe65f519b8db862ce90eecea9927bbdb016990f0af618b15d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM24S1911700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a955416829311f934ca2302a1aa3017ff2c30146e5576adf971ab151bcc93e4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM24S1911703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f78c7e989a3e5894f6a4a819932d870213a1f106d7388c855ef2a57d9c1cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM24S1924350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cb3b0970476fde135bbcc941399b19a2c5b429db8527994c672223ce190e18. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FR9Z62300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4d2a06d804fd0ac99b2f63c28a573b0f0cea031a282cc156ec14c622bec71. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:07Z), 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/FR9Z62300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d1a8dc6bcb66f260919a42052249ececd1ead55f80c62c606121cdfd9ce05. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UKXN22526159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ee6bac08531f78b7dff147917241dbdb03dacc998feea52155f411f5a7efca. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:10:06Z), 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/UKXN22526160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb28a63f693177d26c619c4218878fedeacb325dd5705bc8aa4abf345efc50a6. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FR9Z62500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521dfe89f25046b3331a4d26cbf076085354f196f7fa2693368a58b858e4e93c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZDA52067528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe388b1152caf34e4047eddf93f08396c06a3deaa760d66ccc34717a5e6eb4a6. 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/USUG12103217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c168586b002db8a443fbfc3deb56f4665a92197e40f0ad45986b03a64651a6d. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/QM24S1916920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b039a635a1cf35115edd66e7480e7ecca26716937f19ec6add3431abc14796. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2126806.