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 0xf57a1578d8ca5b9cc75d323cc1b1be4fe853ec314b3e0c74abaeacd3598c6324. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ef4493a-ba6c-4fbb-8f68-eb28d126da08.json and https://artists.proofprofile.net/proofs/artist/1ef4493a-ba6c-4fbb-8f68-eb28d126da08.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 0x323a9cdfd3c19b1dea514e4726471f63d4800965f85c972cbc5c6458bfe731f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6N21547358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325105e3b118a4620ff3e70e4c338210eef571c164eb347126c509530c3fd8f6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6N21547360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107c25327060cf9d74e45a55a1ac9ee5fdc399ea904c267eb9fdf9f6e6ba123. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6N21547362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891660f31b40b00a37d0302b5690b444ceaca928646886d9d1511ffb3e902391. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N21547363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3548cf17392bcf4369997c3be5bd94a3c0277b2705ad7000bec73004b57663. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N21547364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76e55d3fb13510cc11a31fee05fb60e97550dc3c79f0796f2bf3146ef7ef6ae. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM6N21547365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ecbac394d1a5f3458da3032fd4324a77aea994b6780c919582aea9c704bd4a. 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/QM6N21547366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d02a5eaa7d422e1b788d997faedef96b5d13b8d898596ea0a2f0def6dceb8d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6N21547368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f06df3e93f2af7743af8d4bcc901132c4ce241e02404217791e7a1a2afff3e7. 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/QM6N21547369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd959b8bc7e751622c6f0da6e94cca7a1cbba2ed9f6d8b4670ba938bd0f510b38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N21547372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eccc9dbfd9d84ccf21e1c021955bf6a8ec95151199f51fb65c5d45eb66bbfe. 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/QM6N21547373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7606e9ea3bc974081aec9df4f7a15ac132c636983201f139adf7f6f0b1dceed. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QM6N21547374.
Piezas Gregorianas de Santo Domingo de Silos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbecbbc06008173552e297599ce849d2c3cf094a5e036a2b83fc29abf09cc0b9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41465388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa548164ba658a0add6a4a0d839db8fd133701f20586fcd0683065ad7d652e0b5. 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/QM6P41465389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c9ae4d0ae1c98e2e015806c6620066a9999c313fd74334edd5a53c670dcc9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41465390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76b73ee557cb163e2eeaadbfdce0d90ca6ab00e32658d4a8dd38baa1ed8587. 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/QM6P41465391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e605ea98a58cfb66dff77e004a7ef57088b9baf7b28d0f6faa31bd70efb7e9. 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/QM6P41465393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e286066ff2e10559aad3f33a9f39d16cc800e908ddd72c54839a2badaebc378. 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/QM6P41465394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8770bb34a73e594b727b9429787e98765dc3629c343e7e0a70aaf2a1609c5ff8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41465395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402617b33a36aaffef079b9b531e3a8b3147503d4e728856b21d8e632497cd9d. 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/QM6P41465396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515c476d8d2cfc2ebc2291c1cafef5b5b0d1dee82aad783c6a21ff76110a412b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QM6P41465398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf57cf8a98c8bb16aff80909cf8a15a526a5e25585297c2cfed6a9d6e2efb74b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41465399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fe2d1732c62d0f206929d69f770a6a1a8d014294ebe9918e7aeb097f60c9b0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6P41465401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7ee0f127ec2311ec0144c27f2256ca7536bcb0256b9eccb9ac2d85f357aac8. 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/QM6P41465402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737a9e2c02cb5dd62fe9a18c5e52fb92ccfee6a6df9498781193bf5dfc3a3128. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QM6P41465403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0318a74a8446d0cac33c07184a3fd1a112b7da9a01214de739d1f1352162e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P41465404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66de3809c8e5c06a187eb399f273a97815eadf78d86cea94cc29c64a95484f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM6P41465392.
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 0x231a752349626b9b9388ef71a9a34198043b60fd98465f3bf1cb889dbbbdb19d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6P41465397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab5d66d632199002cf2298a73da1369689f8dddafff32e95eb7c916f138b884. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6P41465400.