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 0x56a46438b5af394f215fcd781a52488847c20fd0800bb752b7eabf7b6d00b2bb. 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/12a37168-15cb-4da9-b00b-0269a07428f9.json and https://artists.proofprofile.net/proofs/artist/12a37168-15cb-4da9-b00b-0269a07428f9.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 0xeaa48cd91affcfd004df0bc8ee69dc8d07d050d93c76da5574104f09d110a6cd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBUQH1500168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6fc3fce2646b659ed27effd0b8df76968fa306885534e507f9e7bdc9b5693. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBUQH1500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ca8d8af7226f8091ca2e7dd3d0a618bd83ed6c60decc05b56f89c61620030a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/GBUQH1500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07b72984370ec04874afc0e6a6e9fcb62cf72af0a35e92e3deb576e6cde5cd6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBUQH1500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b8af7190a5be247d5b4b010dc7b262520abfb5f179868c1c820f12580118f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBUQH1500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6778e17ea3825d855ad858bd7b9b69bc8d026ebd0a235c4d2acd0eaa9314a59. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBUQH1700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65c806c7cabed14d44ed91d6a4bed5d6745fa840694a306107886c11e468176. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:58:33Z), 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/GBUQH1700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee602831d108d74f163dfcdcef46f4b89851d0787738629e33d0c18439889d75. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKCHC1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabafaecc6327223a0d5475afeb6569dca7b38679d443cbc79dd78b6b40adab58. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/UKCHC1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba6dc5ab9ac5017ea907451de8f711de0b4527a60d3186390b142edd555ba1e. 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/UKCHC1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e6635f7f530fb18c2d03fc1126c1d24c4a0b8b100fd7dcb0b7b2221b36ad97. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKCHC2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2def7ac18f0ad438c372d9132e8f66131b61820b1d1f56559b38a903e6e00cf3. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/UKCHC2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3662c3c8f002d5cdbb750c4cd4264720c661939e6f7e97e02a6bfe4e4f3cfb40. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKCHC2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a55cd61af889a00031304489167805e8d1b14cb25b5b6b84d22757b9f224492. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/UKCHC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e1cd986bc89134854e63334b4d321d2dee5f2bf402717044a1e9e33dceff9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:36:07Z), 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/UKCHC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91512ebdd5f03217fc7402753dad9b77fdb9208b2ba4f3e82c7ecf9d48aa1b5. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:01Z), 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/UKCHC2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943980c7e0299c80e5d6d32f36e86b06b8d2d1fd3ce84514fe029aef5913c3b0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKCHC2500002.