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 0xb30188338b8801ae600c389c511bc253a54960140f98aacf8b24d417e8588fb2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b817c9b4-988f-4ca3-b7c3-59d45cfdfdea.json and https://artists.proofprofile.net/proofs/artist/b817c9b4-988f-4ca3-b7c3-59d45cfdfdea.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 0x2637c876f715b284241f2475fc193f5b32e3cba40970e40d7b60b3208c7ad153. 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/QMSAV1102303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ecd7e59ec913429775f650c568ca1d8964946ebbc177ee32eb7dc4071f41ff. 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/QMSAV1102305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2db9fc226344fbe10c4d06381dc32eb4b9ca5e214bfe273da97361fe4dce1e. 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/QMSAV1102306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4932edf4c83072b41d6f8944ce2169a645f847f97964cb8c5207a42c42083303. 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/QMSAV1102307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a6395f8f853ce87617c6a558f72ee0f678392453766daede74441ab3da298d. 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/QMSAV1102308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b91e8659eba8cccf00e3651751a5a7bc1679ea91d6b37fef26480280eeafa. 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/QMSAV1102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867936a38eaa8fcb81c55e5d98198ac9d738627a5bee8bf5770748dcb25d1c1e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QMSAV1102304.
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 0xde7946247b1b09c4a972852b7ebb6a9dd41af8462ce52943bc5864cb4946ccd4. 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/QMSAV1102309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a25eee744e955c5f966b6bff4cdb6e004f9b86dc51df13e720147e69ba8d0b1. 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/QMSAV1102280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784f71daa8d3eca708a423c3e192f849212541ed1e8601d07b00bea0fb62d26e. 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/QMSAV1102282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595f850c49767cc9198fdf3bd18084b451786915812dd0a199917bdf6af20fb3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMSAV1102284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb118f5b770f2d21601ee60c1da812dfdff041687afcdc89d16eaec09bf7ab7. 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/QMSAV1101909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbb24983ba735ca1fd7e573abd1e74a86763f5453d28246dc0f28a9f38f9f86. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:41:58Z), 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/QMSAV1102286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7621a544330fb7d8042610e9d1e5e792511b3a53548428c3276e5fd006539e. 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/QMSAV1102287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6ec5c3a4ef594da2850c49d24a84203c8a09348c1d4c03f9223bd06bc17931. 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/QMSAV1102883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042f86a585e6ed66a96bccf167c5427a758df67b6e835e34fad0cc2b8296982e. 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/QMSAV1102390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe602b93a8e1e3bda0f88cc31246dbd6d2c66457a2e1bee116d01f6a74e947b5b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:21:51Z), 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/QMSAV1102391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d205e0111e9bd1d5eefae2756ee6095d08e1107a50a0a3c5828a5e34899a47. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMSAV1102389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d36ae43ceea04b012b30ffa97d9576e79af597425e0077aad95f2c4b545700d. 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/QMSAV1102392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebe722bfc874a5dbeebf8e1c01081dad3c8c87af3dddb2f3e9987a64c86c043. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMSAV1101955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed14ed349e02b09dc7c2ac6832f3f5072f29385c4aba4d81a99ff1c75dcf6b37. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMSAV1101956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c3838e279c0ea3db0d2bebfebe70e2e750b6b63a4bd79d59e1eb46b4c8ffc3. 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/QMSAV1101959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d28286e5bd70c531c8b030f29fa0dce457d9b2474f3342c03f17c0cd6fdd5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMSAV1101960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1272cf9bc1be9f54602483f6eec927c7d9e6e65f137dff6714e6efd6f29263fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMSAV1101949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330db99e45c3686d8a998b9a13d8e2a2a4f6e74233ea1388ddcbfb39f4f7067d. 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/QMSAV1101952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc628f56f7dcd1bbe73ddce5931487bb73d2e6ab43196db3ee7c999e4855910b. 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/QMSAV1101953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacadf3a67b55c87da4503623c98bcd050cbd3c37c83cd2eaad08690ce6545213. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMSAV1101951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5060579b70d89d89a0db10e48af0d45d3985e5111927b85ffddb2408f56d5. 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/QMSAV1101772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc2b35281b60fb40c80112e761b90d449e95ffad75e65cd5f5b4008dddd445d. 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/QMSAV1102269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460610a883b4969c07b10ca1986143f125dfa827a42b17c20369c2b2b07ade82. 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/QMSAV1102536.