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 0x9a694ea41522835edc2979e8f09bff8c23e3b993c80b833f2b82ae45efd54058. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2b64394-87c4-4a13-ad00-4291269babd2.json and https://artists.proofprofile.net/proofs/artist/a2b64394-87c4-4a13-ad00-4291269babd2.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 0x1c8543b6fade4d9878f0b548c88262aa2962173c167c8a7d4a6c82b1c994dada. 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/BR9Z22300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20819c152e4dfd1ec0b2dbcb093781eb84fdaa5e759f87129395bcaa2a856a44. 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/BR9Z22400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef17493d9f547d93ae455f60f8ea9db026bc817acb9796cab8d9f088c48ddb. 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/BR9Z22300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14fca3cdf0940b713d57b8899c5798780ffd63884e4a87f1dfdf3288a4ef6b. 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/BR9Z22000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf263440d51af7cfb4dc69ed289443cb864f5982fba50260e96d57f03b51fcb1. 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/BR9Z22100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d0aca2ec2c46d89bf96cdb28967611986f806890b525f770958f9a89a63a4f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR9Z22400077.
Acústico Altamira #33 - Flores de Setembro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f2922b531d5e2c3fe07df80a3ac7802edd5e8ffc5c1e626ddb8bdd18839a6d. 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/BR9Z22400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839131b9286c69236e1563d78d6e3eeb1bdda731fa02ac9e5ee143a52bb74aeb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR9Z22400154.
Altatrap #9 - Contrariando a Estatística
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c26985b43f75c03402ab95c3995d0bc22648aefcaeafdc246d2a654920b8289. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR9Z22400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9696a80769a16a17a980c41f726f2b22dbc94916a947ad5751ac4d7383826f0b. 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/BR9Z22400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5185dda5aa539b11cfb8b7c3861d793d87564c9313a2fe6a17efc6477a45e975. 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/BR9Z22400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7496f91d2e1c0f94b77b54a23ee51c406cc3d0ec4202147d4f201965f8e1b2de. 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/BR9Z22300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e9db08cab77a911cbb7a1c822ca31587376fb8a1c601d72b03cc2b4155ea6a. 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/BR9Z22300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc0bb027c755ace706bb5c20e5df8c49f56ec52f5cb7c6bab5c701c96cd8a40. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR9Z22300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d9f936b8f88ea0cccb6c3c1c1679a8be38ad8b4194376cb76073bc235016b3. 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/BR9Z22300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b66be414f9f635ac8d171204d9a72da001d6aa2a96b7e6fb564535d1040d1d7. 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/BR9Z22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3985956cab997b18281863bbc9b3d573268907b4d4e44cfe99a7aa39a36fa73b. 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/BR9Z22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f399a41bed0441c430e578e598afc3f623d5594f164915a72757068b9b2415. 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/BR9Z22500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf362c5b72e518246f7a18e7b2fb286046022b6d3f75c434a7eb56fbccb12bbe1. 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/BR9Z22500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f37e78fb0514e7327261b10bc180845ba231ccd1479aee1f9af8ca1be6d71d. 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/BR9Z22400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fcb1f350dcd785070572f5c6f9c1bfad57859f20267483f8eea03d591faf6c. 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/BR9Z22400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d7778fa96908feee1f8b2d3fd1382eaadde808edea53ef5663638a29190d7c. 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/BR9Z22400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fca14d7f08ebf34c411ad84d0f5a27b8bf2e8d121ec85ff2a9e225f4a6c45f. 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/BR9Z22400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282e0d5063c27e5025d47b76e72ffd73c8423167e6de118c696105a27510741. 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/BR9Z22400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf25ce0ff1b106123a788f2258c0dc86b9ac569d61be37b3d2376718dc1a89c3. 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/BR9Z22400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e048732331885cfc81fa7b1670701677a927de1c4b240f865375ccfd4cf98c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BR9Z22400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f21a713c4fb017aae14a95e23862b67a22075d55081b963bbd4166fe4ec390f. 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/BR9Z22400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef17493d9f547d93ae455f60f8ea9db026bc817acb9796cab8d9f088c48ddb. 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/BR9Z22300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a78ed0090c336cf7d979a75067b218931dabb376986ee86f83d625e1a42a34. 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/BR9Z22100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167daeb8c649d1f4621687e2b8c73eb68bbd05c0f54ab5b200451ac115db265a. 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/BR9Z22000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fee790c62aa0473532f0f05cbd5eac9bf62398dd3e524269392c5516b7da2d1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:17Z), 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/BR9Z22000131.
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 0x59e4765e1b2243f3762c0eb8aa5394440d1b6a482141ebab04a3fa7e88347d8b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BR9Z22300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c458c3a685e8132f7ca47e45935fcf32c15f7180883daec3f934e6320c005f4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BR9Z22300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69468e0cb316e0acc12525a93cde489d4d0e3e3aa292a07e494aa41d6a180387. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/BR9Z22300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a0b03c3ae52e447de4353637a5c608e1bef60f577d416782d4a8c67fd49ab. 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/BR9Z22300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c667d5e6801aadd5d62075f4cbf293aa7284226b9f63f7b3cf8905b3bc0019. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BR9Z22000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357bf67bd0087e404cc777da3620e8aa6f9759345c29e56b71f3d588b85cecf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BR9Z22000056.