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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 0x59088b6c9b45e4e72c203b097f55b21413f21251650c21ecb6bd03848038cf6f. 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/e32aeaa8-c336-4718-9a32-6633d239130f.json and https://artists.proofprofile.net/proofs/artist/e32aeaa8-c336-4718-9a32-6633d239130f.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 0xa59f850ebc59a79f2cc56411163b631b045618d9a40b3b54704b2e6161cc3461. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:53:55Z), 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/ES6009600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a5c99a093ddc33922540a94228be320c0c04948204e908a184f46f08755001. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:05Z), 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/ES6009600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23854c9c63ee2d205cdb8e37813f7b5b98096e61a02869ccb1af306c5e0a5d11. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/ES5079800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081b78282e14c1811623922e40a8371ea4e2dec73aa8954dee6482715d97d6ea. 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/ES6009600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4eb87f805d4a1536e9aaae3a534efb6144ab7c4c3d1688136ba8f6df31a78. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5709900629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4978b4ffd4b7a9b597ac95e7e4eaf863f26a9b64e13d29d7e7f5fb092bb0a770. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ES6009600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf1fa74f13b0ec8cdf9efc44d55182a70dc22e5e34749f095b5191f0b59fcd3. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES5079600515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff078f33b948d7664714938365992c8c2bdbbad8da76dd0f008f2c1e4f4a2fd. 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/ES5079700543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9eaa7a4e8c7f66d34b0ea201f4b8da9c90956aed0a1698998b2552639f219f. 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/ES5079700542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1cc2127f931a57892534b3f567d4448e27be12f77249092698a5e9aacc37b5. 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/USA561068046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df68a1609bb1c68d478b48a45e706204bc7cbe440be00280cc9a448144bfa50. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:54Z), 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/ES5079900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd69ad2569cb79aa598bd3ae79f842e49eb05eaa2f86f83c5a3844e0e4d1683a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5079900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ddac8fd77846e1dac268cdbeafdd5f226a55603d96cada0ddf160fbe247a6c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES5070000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd049a5794a1807321729a557fdd394cf40a13e4018647e89ae4f196c491970a9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:27:08Z), 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/ES5079500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee4c188636b570b8e405bfdc56e5fce7f274d832931536befa7a6fc8eb314bb. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:22:10Z), 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/ES5070000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6152703e02f12d63daec508dabe879bfb04a4ce4b8a704e176eb7f2ece562b70. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES5079800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293f24c8f06f7af5efcb7ff2d60d26aa19309fd7186d4df49725151b01103ba6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES5079800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cbf830ec430b97a079b6b307b9d2034a56a89edc409f5e011b3b4be54fbdb0. 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/ES5079800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc113c3ebfe5131a841ecc6b04994e4c8c6c063755c811ea50c11393385f3304e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES5079800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba7e03e1eb3fd13c1d394006771ecdff757ac6083c322b46e0b1c3ed3c70a7d. 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/ES5079800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8412faedc0ffc9288afc9c65ce89e6b0c496a44f1c7ce832eca901ea0af9ccc2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5079800029.
Tú Ni Te Imaginas / Cariño Mío / Sentado Junto al Río
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02768cfc12dae03b7d5b87007119637ddf8636301ca6cb386b9e25f7c2ad4195. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES84S1601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156019cb80a85d9146b5ef5b6f4600a9565177bf1f531eaeddce150df96b6e9c. 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/ES64E2410209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35366ca281da3595fd64fc6b191bd1879ca0815adc854e0a359c23380a6d79. 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/QZF251800160.
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 0xb852c5ccaa80e3655a61bee2f48ea79c20d99882f82afdca6599149a015f0cfa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES71G2104855.