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 0x476024ca1782bc5c317fbe0d4f44bbe22c9ea1b1130b3bf8faf12d81ea351c72. 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/9697677b-7d4c-4dc5-b102-60978b2379c9.json and https://artists.proofprofile.net/proofs/artist/9697677b-7d4c-4dc5-b102-60978b2379c9.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 0x153c41157e038298bb056a5867a33ecf4ad3be898bba93ad7f4b35c083e5753b. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CA5KR2004300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e0957603abb035dc0177e8009e910672245787b5ac1f406ebd7da7449c9f96. 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/CA5KR2004305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e846e873dfea784894d82b1a73d27ce7d17b71e3a3205ab1c288d0eca8749d4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA5KR2004362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f88a7c5d564844bf52b76ec6d369286df766b65e1df8d9f26a12295235998b. 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/CA5KR2004363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29d82cb06e910a4d84a1fb75d7f1f3e9ae8b995bebea33d532714a2c83ce32e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:43Z), 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/CA5KR2004364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6ad09531902c49a55d8061a01c6f179f7c7fbb10f24379c4bb342069e40ad6. 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/CA5KR2004365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762914a0c105668cbdf74faaf4526c4b20509fe1475c75c3ecc87edf26900cda. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:42Z), 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/CA5KR2004366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a88ff7060cb69f61b231041e697d520f770724a0ed6bf3c5fecb73be6319a7f. 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/CA5KR2004368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819880312e32dd783d93e42e6b4fde3787bec7ee2396f2897771059d5fb86fa3. 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/CA5KR2004369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aad75f5ace146ea6ab607b951bc339d8530865ceb478718a37ec0a9d4bf0c0. 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/CA5KR2004371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55baa76ab426b2b678784e4e6be8bae94271de7d36ffd87bdd52c31ab0cbcaca. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:36:29Z), 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/CA5KR2004372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531b1bda0caa20d849453485a6dced8725d295834b08eddc26678b4eacc9239a. 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/CA5KR2004374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc6ebd21e67d26489aee0e032224336cafa7d312822fdda440899651c6e2862. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CA5KR2004375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3757a047a8a42caa47eb2f42c1f6fee2b80993247247f949a87187d107c14b42. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CA5KR2004378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80a708d4044a4feaacc86b0b6ed5c8c70497ddaac79981583bff35add8688a3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2004379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da71f46bf847d297ce9f71b177329f087f05eaceb2694cf58bd2a4ef50e2612. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/CA5KR2004380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9059c49ce8de69615a765f22127168603cfd1bfde965353219d3f476551c784. 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/CA5KR2004381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5f038656c912ca14f0881f69b78d2d16ba848651466bfb2e030fdcaa701093. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CA5KR2004382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4076458973c8ae4d8b99329a0aceca139a2ef62569c846b5868e4c81627bc732. 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/CA5KR2004383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc907715778d89b4f809910fe373239b82e8cb9c9f89ae62053b0f26363c241a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:19Z), 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/USEW19900245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742b791a5770ede85fd0fbe55b9b71fda137da1327a14641e9607b6e9b711c95. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USPO10900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd20917bd493c8e2fd35f2b1b72a13db14df78cbbffd582f45117d504169216. 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/USNL19600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2224a4468d1724432bfd48ffaf64c1f692224e50388a5367fe692842a074597c. 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/USPO10500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2224a4468d1724432bfd48ffaf64c1f692224e50388a5367fe692842a074597c. 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/USPO10500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eb160b547cc6e30327987659e4503d5610d353a578a4ac0c19f215a70eb0be. 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/USPO10700225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1babb8f5f2fa6e928b8dae4ef26c88f0110f0136b79d62cddcf50137b371f1c. 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/USMC10110610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6392c7aa3659156b7e76894fcdfc9568b031795252e88d48acff6db6585307c1. 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/USPO10700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e6df74b1b75924047245d5bc24622114d28a59ccf74a16643f9d5e05f6cab. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USNL19600001.
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