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 0xe1b13c748b1e0e562879492b09b4f8ebc99d47722a6cdef1ce9d6895d46f24da. 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/e1c8a0da-c0b4-4f16-aab4-2816284dbca4.json and https://artists.proofprofile.net/proofs/artist/e1c8a0da-c0b4-4f16-aab4-2816284dbca4.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 0x5292717222ac3e903de63bf32844b7182d26b5e28073224cb6237ee730b68c86. 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/CA7KO1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ff6f85cb75038653d34bce697fd98b38118841d6f144aac9b1ad7057cd9bb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:07Z), 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/CA7KO1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093be5fe5165b11c7513d172ba78279552ff4185f3ba64b3604995b4df04a394. 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/DEH741905949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa314c0cc5b0147eb08c77b6009cee425d741606f19894db991a10efc34ac01. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMPVD1201087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20697a595da020210304a980ae9913fd9c77aea4f41520d0afa3088b6fc786a8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR2217414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec19e2632680c272502d0d8f30a782cf16d47e22200fde16e11b11bb0aab734. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CA5KR2269645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f32ae35aca7e4298e1a8025b386c4db288a5c99eaa1a1108d756b7331f23b46. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CA5KR2354015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcf17c5147ed74210af29aafb21d9396e57afe9c3f50a6ed0f6a92c7d1a2c44. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2373440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d24bf14910cc932382fbb190a00f737d5c9030bd4bc16d8bbe5832b145fd246. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBSCL2335095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd042b39f26f828db7b50b47ea3e4a399c31b72b0563929145f5a51abf23c469. 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/GBLV62320243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e86ec88c1f2b8f421ed899ccdd22669d1e1ef88dfcd1392e012264253ab92d3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/CA5KR2416650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bfaedfe21f2e3f8fee77121415466ff70f3f816f500de11737c2486e54c577. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSCL2435080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74040b0eee2f71412953ff99fcc9eb5aa65de8bb21fe1377433d4fbbdba64bf0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKQU2477826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2e9a1e7733f08af4c26563b506e28a8eb83b0dc34ed50079f76da0ad781a1a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLV62401242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e4b98710a81ea39bfab2c4eccfdbbbd526533526a959ba6fc8afc38f29af7f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:34:13Z), 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/QZG2X2407356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23e09edfcb940e409c8b42d1df7640a5d07e81177d3e2e970c0cbe94e51b9c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZG2X2412252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a22274ffc816892aaa5cb9ff0049aeb23a02f139090d9498f8f7408f0a34f2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZG2X2410638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2a786ce541f02556f562a07871adc2f0c4fe24e9be122a314dbf2ff68da714. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:58:37Z), 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/QZG2X2410639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6147a83705960835ae59305e97b6879066e4bd349a6ea6c6ddeb97b8eed39a65. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GBLFP2562422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75350859d6f6571333d413959f3d73147bb9373b3dd8b405d1f7bcd49b2c791f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:00:19Z), 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/GBLFP2562423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8586e7e6a0e35ec8e3b5cdadee3e43d621a23315ad697f8103ef31c8e2bd37de. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBK6Y2552501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36bb67901d9fa6f9993ab4ed8a9f0a3564c73fd706e1c67e4344a703cb3dc90. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZG2X2417436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521f069ba3cc3eb0bd2fd7d2cdb6079e2e12d8269c5af063f1d109a817d14e9e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZG2X2503760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8853f333247e8cf169d248cf3670520f7f8a87f8501a0e90c06c821f6a4719. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CA5KR2590091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce79b4ee29a197f50566c91495e76b59a9575a623bf2b792cf506b857007e4b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZG2X2503969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65e9ffa50b91a237ae3260e64d7850181524f524eabe0f6b09bec453aa12768. 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/BXG9S2501286.